Update to tk 8.5.19

changes

@@ -6911,3 +6911,164 @@ Many revisions to better support a Cygwin environment (nijtmans)
 2013-09-15 (bug fix)[8eb5671] macosx Tk compile errors w/clang (deily)
 
 --- Released 8.5.15, September 18, 2013 --- http://core.tcl.tk/tk/ for details
+
+2013-10-27 (bug fix) OSX drawing lags (deily,steffen,walzer)
+
+2013-10-28 (bug fix)[3603436] png wrong component indices (nijtmans)
+
+2013-10-31 (bug fix) C++ friendly stubs struct declarations (nijtmans)
+
+2013-10-31 (bug fix) double free of a TkFont (nijtmans)
+
+2013-11-03 (bug fix)[1632447] support PPM maxval up to 65535 (fellows)
+
+2013-11-05 (bug fix)[426679e] OpenBSD man page rendering (nijtmans)
+
+2013-11-11 (bug fix)[0aa5e85] option file \n syntax support (nijtmans)
+
+2013-11-20 (platforms) Support for Windows 8.1 (nijtmans)
+
+2014-01-23 (bug fix)[3606644] X: correct fontconfig dependence (venable)
+
+2014-01-23 (bug fix) FreeBSD build fixes (cerutti)
+
+2014-02-06 (bug fix)[3279221] [menu] event race (danckaert,kupries)
+
+2014-02-11 (bug fix)[52ca3e7] XkbOpenDisplay macro correction (nijtmans)
+
+2014-03-16 (bug fix) Xcode 5.1 update; Retina displays (walzer)
+
+2014-03-20 (bug fix)[2f7cbd0] FreeBSD 10.0 build failure (nijtmans)
+
+2014-04-01 (bug fix)[5bcb502] @TK_LIBS@ in pkgconfig (badshah400,nijtmans)
+
+2014-05-27 (bug fix)[a80f5d7] autoscroll initiation (crogers,english)
+
+2014-07-07 (bug fix) OSX alpha channel rendering (culler,walzer)
+
+2014-07-24 (bug fix) OSX [text] image display & scrolling (culler,walzer)
+
+2014-08-01 (bug fix) OSX font config crash (rob@bitkeeper)
+
+--- Released 8.5.16, August 25, 2014 --- http://core.tcl.tk/tk/ for details
+
+2014-08-27 (bug) Cocoa: Crash after [$button destroy] (walzer)
+
+2014-09-23 (bug) Cocoa: button and scroll display fixes (walzer)
+
+2014-09-24 (bug) Cocoa: improved drawing performance (walzer)
+
+2014-10-11 (bug)[9e487e] Phony button clicks from browsers to plugin (nijtmans)
+
+2014-10-11 (bug)[810c43] [text] elide changes advance epoch (vogel)
+
+2014-10-14 (bug)[fb35eb] fix PNG transparency appearance (walton,culler)
+
+--- Released 8.5.17, October 25, 2014 --- http://core.tcl.tk/tk/ for details
+
+2014-10-26 Support for Windows 10 (nijtmans)
+
+2014-10-28 (bug) OSX: Improved ttk notebook tab metrics for Yosemite (walzer)
+
+2014-10-30 (bug)[3417012] [scale -digits $bigValue] segfault (vogel)
+
+2014-11-06 (bug)[9d72dc] memleak in Cocoa buttons (revol)
+
+2014-11-07 (bug)[3529885] [scale] handling of negative resolution (vogel)
+
+2015-01-02 (bug) Stop bit loss in [winfo id] on 64-bit Cocoa (porter)
+
+2015-02-06 (bug) several fixes to elided context in [text] (vogel)
+
+2015-02-06 (new feature)[TIP 433] %M binding substitution (mistachkin)
+	*** POTENTIAL INCOMPATIBILITY ***
+
+Tk Cocoa 2.0: App Store enabled (walzer,culler,desmera,owen,nyberg,reincke)
+	*** POTENTIAL INCOMPATIBILITY ***
+
+--- Released 8.5.18, March 6, 2015 --- http://core.tcl.tk/tk/ for details
+
+2015-03-10 (bug) Cocoa: premature image free crash (walzer)
+
+2015-03-15 (bug) Cocoa: wish launches in front. [focus -force] works (culler)
+
+2015-04-09 (bug)[e4ed00] [$text index "1.0 display wordstart"] crash (vogel)
+
+2015-04-09 (bug)[562118] Unicode support of "wordstart" modifier (vogel)
+
+2015-05-05 (bug)[06c3fc] PNG alpha error corrupted output file (gauthier,porter)
+
+2015-05-24 (bug)[53f8fc] panedwindow geometry management (vogel)
+
+2015-05-26 (bug)[1641721] tk_getOpenFile symlink display doubled (nijtmans)
+
+2015-06-01 (bug)[d7bad5][2368195][3592454][1714535][1292219][3592454]
+		panedwindow fixes (vogel)
+
+2015-06-25 (bug)[805cff] Tk_ConfigureWidget() segfault (aspect,nijtmans)
+
+2015-07-13 (bug)[3f179a] Text widget crash with elided text (vogel)
+
+2015-07-16 (bug)[2886436] Stop [$text delete] acting before start index (vogel)
+
+2015-07-28 (bug)[1236306] TraverseToMenu error bound to toplevel destroy (vogel)
+
+2015-08-20 (bug)[00189c] MSVC 14: semi-static UCRT support (dower,nijtmans)
+
+2015-09-29 (bug)[1501749] Crash embedded window delete bound to <Map> (vogel)
+
+2015-10-08 (new feature)[TIP 437] New panedwindow options (vogel)
+
+2015-10-09 (bug)[1669632] [text] autoseparator placement (nash,vogel)
+
+2015-10-09 (bug)[2262711] [text] RE search Unicode+elided (kaitzschu,vogel)
+
+2015-10-09 (bug)[1815161] [$text count -ypixels] needs management (vogel)
+
+2015-10-22 (bug)[1520118] Document spinbox validate expectations (vogel)
+
+2015-10-22 (bug)[1414025] $entry insertion cursor visibility (vogel)
+
+2015-10-26 (bug) PNG rendering on El Capitan (meier,walzer)
+
+2015-11-08 (bug)[2160206] menubutton panic (vogel)
+
+2015-11-08 (bug)[220854] Display trailing TAB in entry (vogel)
+
+2015-11-08 (bug)[542199] double click on lone char in entry (vogel)
+
+2015-11-08 (bug)[297442d] strict motif binding on <Control-underscore> (vogel)
+
+2015-11-08 (bug)[3601604] $listbox -takefocus (vogel)
+
+2015-11-09 (bug)[5ee8af] X, Win: 64-bit enable embedded windows (vogel)
+
+2015-11-29 (bug)[1997299] [text] tag borderwidth leak (vogel)
+
+2015-12-12 (bug)[1739605] [text see] misbehavior (danckaert)
+
+2015-12-13 (bug)[ff8a1e] Never-mapped [text] performance (danckaert)
+
+2015-12-19 (bug)[1700065] Report errors from -textvariable write trace (vogel)
+
+2015-12-19 (bug)[793909] -textvariable handle undefined namespace (vogel)
+
+2015-12-26 (bug)[2f78c7] crash with [text] and [tablelist] (vogel)
+
+2016-01-06 (bug)[1288433,3102228] <<ListboxSelect>> misfires (vogel)
+
+2016-01-08 (bug)[1510538] initial scrollbar width (vogel,nijtmans)
+
+2016-01-08 (bug)[1305128] event not received by scrollbar (vogel,nijtmans)
+
+2016-01-09 (bug)[1927212] Mousewheel/scrollbar bindings (vogel)
+
+2016-01-11 (bug)[63c354] Cocoa message boxes (culler)
+
+2016-01-12 (bug)[2049429] get more $text options from database (vogel)
+
+2016-01-25 (bug) OBOE in ttk::notebook options parsing (bromley,english)
+
+Tk Cocoa 2.0: More drawing internals refinements (culler,walzer)
+
+--- Released 8.5.19, February 12, 2016 --- http://core.tcl.tk/tk/ for details