Add .travis.yml
Added linking configuration for win32.
Merge pull request #39 from ameyp/master

Added linking configuration for win32.
Fix linking for OSX and Linux

…hopfully? Used -lglfw3 on OSX, added -lGL for linux builds.
Revert previous change to linking on OS X, and add a note and FAQ entry for Homebrew users.
Return an Option on window creation
Fix travis.yml.
Merge pull request #41 from sebcrozet/travis

Make compilation work on Travis.
Use `Option::expect` instead of `Option::unwrap` in examples