Add support for with_visibility(), show(), hide() on X11.
Merge pull request #120 from glennw/x11-visibility

Add support for with_visibility(), show(), hide() on X11.
Update for rustc
Merge pull request #124 from tomaka/update-rustc

Update for rustc
Fixed some compilation errors on osx
Merge pull request #125 from DavidPartouche/fix_osx_errors

Fixed some compilation errors on osx