Exposed FindWindowByName() in imgui_internal.h

Examples: OpenGL: skip rendering and calling glViewport() if we have a zero-fixed buffer (#486)

Examples: SDL/OpenGL: Tabs to spaces

Examples: OpenGL3: Fix BindVertexArray/BindBuffer order (#527)

Allow windows with only a callback only to be functional + minor cleanup (#524)

InputText() added comment (#526)

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

Demo: use locally defined strdup because compilers/standard librairies are an annoyance (#520)

Demo: InputText password demo filters out blanks (#515)

Moved declaration of SetItemAllowOverlap() to imgui.h (ref #517)

Added flag for selectables to handle double clicks.

Updated todo list

ImDrawList: fixed index overflow check broken by AddText(). Added extra assert. (#514)

Fixed removal of trailing draw command if it is a callback command

InputTex(): Comment (#512)

InputText() fixed clipping bounds of contents (#512)

Tentative fix for GCC/Clang (#484, #504)

Remove dependency on <new> header (#484, #504) ...

(Now expecting something to fail somewhere..)

Fixed clipping of child windows within parent not taking account of childouter clipping boundaries (including scrollbar, etc.) (#506)

ProgressBar() handling of border size + storing border size in window structure (#503)

Tidying up internal FindBestPopupWindowPos()

ColorEdit4: Empty label doesn't add InnerSpacing, like other widgets (ref #346)

Cleaned up the top of imgui.h, documenting all types / forward declarations

Added IM_COL32 macros (ref #346)

Honoring exact width passed to PushItemWidth(), previously it would add extra FramePadding.x*2 over that width. (ref #346) ...

If you had manual pixel-perfect alignment in place it might affect you.

InputScalarEx(): removed unnecessary aabb computation.

ColorEdit4(): removed unnecessary calls to scanf() when idle in hexadecimal edit mode.

Begin(): made the close button explicitly set the boolean to false instead of toggling it (#499)

Merge branch 'master' of https://github.com/ocornut/imgui

Examples: OpenGL2/3 Makefile; Added -lGL to Linux build