Portability fixes to OpenGL example application (courtesy of djoshea)
add a quick and dirty makefile to build on linux
Merge pull request #11 from corpsmoderne/master

Add a quick and dirty makefile to build on linux
Renamed Makefile
Removed stray debug code
Added Makefile for MacOS X (courtesy of djoshea)
Update README.md

Added References
Fixed warnings for more stringent compilation settings. Added various small helpers.
Minor warning fix + removed unused function parameter.
Simplified ImDrawList system (samples are 20 lines shorter) + merged title bar draw bar.
OpenGL example now use the fixed function-pipeline. Code down by 120 lines.
Update README.md
Fixed columns lines not being pixel aligned
Fix for gcc type qualifier warnings.

With -Wall -Wextra -Werror, it is not possible to compile against
imgui.h due to const correctness violation in ImVector.
Merge pull request #14 from Roflraging/constiteratorfix

Fix for gcc type qualifier warnings.
Added InputFloat2(), SliderFloat2()
Fixed scissoring in OpenGL example
Fixed combo box (bug introduced earlier today) + adding bit of vertical padding in combo.
Default Clipboard functions on Windows+ renamed ARRAYSIZE to IM_ARRAYSIZE
Tweak MacOS X Makefile for likely scenario