Log Message:
Updated tk to 8.5.19.

8.5.19

Changes to Tk

Commands

Expanded Syntax / New Options

panedwindow -proxybackground color -proxyborderwidth size -proxyrelief value
    TIP 437

8.5.18

Changed Tk behavior

    Debut of Tk Cocoa 2.0 .
    New binding substitution %M [TIP #433]

8.5.17

Changed Tk behavior

    Several improvements in Cocoa Tk.
    Event handling changes for browser plugins.

8.5.16

Changed Tk behavior

    Improved Retina display support
    Full PPM file write support with max 65535