Fix closing X display in get_dimensions
Add accessor for underlying display handle on Linux. Although unimplemented on other platforms, this applies to at least android as well.
Merge pull request #64 from glennw/fix-get-dimensions

Fix closing X display in get_dimensions
Make platform data function as unsafe.
Merge pull request #66 from glennw/platform_data

Add accessor for underlying display handle on Linux.
Add an interface for providing system wide initialization options to the windowing system.

This allows setting up Linux based systems which use multithreaded OpenGL contexts.
Merge pull request #65 from glennw/x-threads

Add an interface for providing system wide initialization options to the windowing system.
Add `platform_display` impls for win32 and android
Fix the cocoa function
Merge pull request #68 from tomaka/fix-native-win

Add `platform_display` impls for win32 and android
Revert "Add `platform_display` impls for win32 and android"
Add appveyor configuration file
Add opengl32.a and gdi32.a
Merge pull request #69 from tomaka/revert-68-fix-native-win

[WIP] Fix platform_display behavior on android and win32
Test now less restrictive
Merge pull request #73 from tomaka/app-appveyor-cfg

Add appveyor configuration file
Add 64bits versions of gdi32 and opengl32