Examples: DirectX9: Removing spaces (#663)

Example: DirectX9: Backup and restore all state

Examples: DirectX9: Removed dependency on dx3x9.h so it can be used in a DirectXMath.h only environment (#611)

Examples: DirectX9: save/restore some more device state.

IO: Added "Super" keyboard modifiers (corresponding to Cmd on Mac and Windows key in theory although the later is hard to read) (#473) ...

NB: Value not used.

Trim trailing spaces

FAQ and comments about the use of ImTextureID (#562, #561, #521, #510, #497, #475 ...)

Examples: DirectX9: Wastefully use a RGBA8 texture for the font texture to make compability more evident with user's textures (#521)

Examples: Not clearing input data/tex data in atlas (will be required for dynamic atlas anyway). Effectively fix resizing in DX examples. ...

+ Standardized comments.

Examples: Header comments.

Examples: Most examples apps detect if ImDrawIdx was changed to 32-bits instead of 16

NULL out font texture on invalidate ...

If this isn't done, NewFrame won't re-create the font.

Examples: Possibly clarified the intent of imgui_impl_* files.

Examples: comment on setting the RenderDrawListsFn function.

Examples: DX9, DX11: mapping missing middle mouse button.

Examples: imgui_impl* functions declared with IMGUI_API to ease copy & pasting into projects using DLL

Examples: DirectX11: resizing buffers dynamically (#299)

Examples: DirectX9: tweaks.

Examples: DirectX9: resizing vertex and index buffers dynamically (#299)

AA branch: Agressively renamed all fields of ImDrawList, ImDrawCmd, ImDrawData to match the rest of our coding convention (#133)

Merge remote-tracking branch 'origin' into 2015-03-antialiased-primitives ...

Conflicts:
	examples/directx11_example/imgui_impl_dx11.cpp
	examples/directx9_example/imgui_impl_dx9.cpp
	examples/opengl3_example/imgui_impl_glfw_gl3.cpp
	examples/opengl_example/imgui_impl_glfw.cpp
	imgui.cpp

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

May trigger new compilation warnings?

AA branch: ImDrawList: rename commands to cmd_buffer ...

Not strictly necessary but while we're doing minor breakage let's do
them at all once.

AA branch: ImDrawCmd idx_count -> elem_count

AA branch: io.RenderDrawListsFn signature changed to take ImDrawData, neater and future proof breaking of the render API (#133 #254)

Examples: DirectX9: fixed size passed to vertex and index buffer Lock() + readjust default buffer sizes.

Merge remote-tracking branch 'origin' into 2015-03-antialiased-primitives

Added ImGuiKey_PageUp, ImGuiKey_PageDown for user.

Fixed warnings for 64-bits builds

Merge remote-tracking branch 'origin' into 2015-04-indexed-rendering ...

Conflicts:
	imgui.cpp
	imgui.h