Fix Tk crash on exit
Don't ignore patch and diff files.
Fix Python mode.
Enable tcl/tk subtargets for Python.
Thanks Ray Donnelly for fix segfault!
Wrap 3rdparty-post script body to function and declare variable as local.
Update GMP to 5.1.3
Copy GCC dlls to Python folder when python mode.
Add dwarf patch to gcc-4_8-branch
Update TODO.
Merge pull request #311 from Alexpux/develop

Fix Python building with tcl/tk. Update GMP. Some fixes.