Merge branch 'SampleSDL2' of https://github.com/CedricGuillemet/imgui into CedricGuillemet-SampleSDL2

iOS Example: Optimise PNG files size

iOS example: shallow tweaks and fixes (untested)

iOS example working based on modified OpenGL3 example + Synergy

Removed the majority of size_t from the code. ImVector<> now uses int. (#262) ...

May trigger new compilation warnings?

Fixed warnings for more pedantic settings (#258)

Added ImGuiKey_PageUp, ImGuiKey_PageDown for user.

imgui_impl_sdl and main sample

Add conditional compilation of forward compat. glfw window hint to fix crash on later versions of OSX

Examples: DirectX11: explicitly set rasterizer state.

ImFontAtlas: doesn't clear input data, left to the application. (#224)

Examples: DirectX9/11: hide os curosr if ImGui is drawing it (#155)

Examples: DirectX9/11: Fixed key mapping for down arrow.

Examples: OpenGL3: backup/restore current program and texture #195

Set modifier key state by inspecting imgui's io.KeysDown array.

Examples: Simplified GLFW keyboard callbacks

Merge branch 'master' of https://github.com/Roflraging/imgui into Roflraging-master

Simplified glfw keyboard callbacks.

Examples: DirectX11: tidying up.

Examples: OpenGL3: Tweaks (argh, github ui)

Examples: OpenGL3: Tweaks.

Examples: DirectX11: Removed unnecessary vertices conversion and CUSTOMVERTEX types.

Examples: Formatting #187

set pixel shader and vertex shader to NULL ...

Previous graphic render may use shaders,so set pixel shader and vertex shader to NULL to force use fixed pipeline.

Update README.txt

Examples: OpenGL fixed-pipeline: added glBindTexture(0), via Anton M

Fixed modifier key state setting in GLFW callbacks.

Examples: initializing float + missing comment.

Comments on font loading, fixed commented out paths and added DroidSans in the list

Examples: Terser code + added commented out glUseProgram(0( suggestion in OpenGL2 sample.