Revert 978c84d because int32 >> 32 tends to warns on some compilers/settings. Add ImU64 type. (#1184)

Version 1.51 WIP tag

Version 1.50

Using ImTextureID instead of void* in ImFontAtlas, not sure why I didn't do that earlier, make things more clear

Further clarifications of the key indices passed to IsKeyXXX functions (#1159)

Merge branch 'master' into 2015-02-colorpicker

ImFontConfig: Removed MergeGlyphCenterV in favor of a more multipurpose ImFontConfig::GlyphOffset. (Breaking change)

ImFontConfig: Added GlyphOffset to explicitely offset glyphs at font build time, useful for merged fonts. May remove MergeGlyphCenterV soon.

Merge branch 'master' into 2016-02-colorpicker

Renamed ImDrawList::PathFill() to ImDrawList::PathFillConvex() for clarity. (breaking API)

ImDrawList::AddImage* renamed uv_ parameters to be more consistent. Fix AddImageQuad to use IM_COL32_A_MASK (#1009)

Add ImDrawList::AddImageQuad ...

Adds a function
  AddImageQuad(user_texture_id, a, b, c, d, uva, uvb, uvc, uvd, col)
that shows a texture on a full quad. This allows showing arbitrary
rotations of a texture.

do not export inline function, it causes problems on some compiers

missing API

ImFont: Store the texture surface used to get an idea of how costly each font is.

Comment about ImGuiInputTextFlags_CtrlEnterForNewLine for InputTextMultiline()

Merge branch 'master' into 2016-02-colorpicker

Minor comments (#998)

Merge branch 'master' into 2016-02-colorpicker

Comments (#972)

Merge branch 'master' into 2016-02-colorpicker

Comments, clarified use of io.MouseDelta (#942) ...

(ImGuiIO structure layout changed)

const correctness for Combo and ListBox ...

Since Combo and ListBox only read and display the list of items, they
should not modify the pointers inside the array of pointers passed in.
Adding "const" here makes it possible to call these functions with such
an array of const pointers. Previously, a cast to "const char**" was
required as a workaround, otherwise there was a compile error.

Began improvements to columns API by splitting the Columns() function into BeginColumns() and EndColumns() and adding additional flags. The columns data still needs to be placed into a stack.

Merge branch 'master' into 2016-02-colorpicker

Font: Added io.FontDefault in ImGuiIO structure to make it easier to change default font from third-party or demo code

Add user-facing IsPopupOpen function

Merge branch 'master' into 2016-02-colorpicker

Added a void* user_data parameter to Clipboard function handlers. (#875)

Minor comments