Fixed IsItemActive() lagging by one frame on initial widget activation (#840)

Fix using IsItemActive() after EndGroup() or any widget using groups (#840, #479)

Style: Added ButtonTextAlign, ImGuiStyleVar_ButtonTextAlign (#842)

Refactor text alignment options to use ImVec2, removed ImGuiAlign (#842, #222)

Internal RenderTextClipped() merged optional/rate clip_min* clip_max* into clip_rect*

Comment

Tidying up PushStyleVar/PopStyleVar() a little more (#842)

Refactor PushStyleVar/PopStyleVar so it is constant time + can receive integers (yet unused) (#842)

Shutdown() clear out some remaining pointers (#836)

Metrics: Displaying window position + moving extraneous line in IsPopupOpen().

Fixed EndGroup() not restoring offset properly. breaking SameLine() offset (caused by 954c890) (#829)

Fixing minor english typos (#827)

TODO list

Fixed assert triggering when a window has zero rendering but has a callback (#810)

Examples: Renaming opengl_example/ to opengl2_example/ for clarity (1/2 because git)

ImFormatString() Fixed an overflow handling bug with implementation of vsnprintf() that do not return -1 (#793)

Minor shuffle to ease merging branches. (tentative. fugly but those fields will be removed anyway)

Minor shuffle to ease merging branches.

BulletText(): doesn't stop displaying at the ## mark

Removed a handful of obsolete (trivial) function redirection from 1.34 and 1.38 (march-april 2015) ...

OpenNextNode() -> SetNextTreeNodeOpen()
GetWindowIsFocused() -> IsWindowFocused()
GetItemBoxMin() -> GetItemRectMin()
GetItemBoxMax() -> GetItemRectMax()
IsMouseHoveringBox() -> IsMouseHoveringRect()
IsClipped() -> !IsRectVisible()

Tweak comments (#768)

Merge branch '2016-08-generalized_visibility_test' of https://github.com/thedmd/imgui into thedmd-2016-08-generalized_visibility_test

Using IM_COL32() for colors in a few spots (#767)

Moved GetColorU32 out of imgui_internal.h to avoid inlining mess (#759)

Add ability to test arbitrary rectangle for visibility without need of moving cursor.

Using ImGuiID instead of ImU32 is a few places

SameLine() with explicit X position is relative to left of group/columns (ref #746, #125, #630)

InputTextEx: got rid of unnecessary locals.

InputTextEx(): more shallow tidying up, still being cautious with this function

InputText/IO: Got rid of individual OSX options in ImGuiIO, added io.OSXBehaviors (#473, #650)