Add CS_OWNDC flag when creating win32 window
Appveyor now showing rust and cargo versions
Fix nightlies URLs
Add support for the OpenGL debug flag
Merge pull request #104 from tomaka/debug-flag

Add support for the OpenGL debug flag
Remove call to glViewport in X11 implementation
Implement Window::set_title for Cocoa
Fix the appveyor build
Merge pull request #108 from tomaka/fix-appveyor

Fix the appveyor build
Update apk-builder
Merge pull request #107 from bjz/set_title

Implement Window::set_title for Cocoa