BUG: Create zip archive and move tcl binaries onto slicer.kitware.com

This should help address issue preventing binaries from being downloaded
on some version of Windows. The error reported was:

// -----------
1>------ Build started: Project: tcl, Configuration: Release x64 ------

1>Performing download step (SVN checkout) for 'tcl'

1>svn: E175002: Unable to connect to a repository at URL 'http://svn.slicer.org/Slicer3-lib-mirrors/trunk/Binaries/Windows/tcl85-x64-build'

1>svn: E175002: Unexpected HTTP status 413 'Request Entity Too Large' on '/Slicer3-lib-mirrors/trunk/Binaries/Windows/tcl85-x64-build'

1>Project : error PRJ0019: A tool returned an error code from "Performing download step (SVN checkout) for 'tcl'"

1>Build log was saved at "file://c:\build\s3d\tcl.dir\Release\BuildLog.htm"
// --------------

For more details, see http://slicer-devel.65872.n3.nabble.com/SVN-TCL-donwload-issue-tt4032460.html

Thanks to "Bradley Lowekamp <blowekamp@mail.nih.gov>" for reporting the problem.

Solution suggested by "Steve Pieper <pieper@bwh.harvard.edu>"

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23702 3bd1e089-480b-0410-8dfb-8563597acbee