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

Merge pull request #812 from linkemars/master ...

Examples: opengl3 glfw: Mac makefile - correct name for linking opengl3_example

Correct name for linking opengl3_example ...

According to glfw offcial site, linking `libglfw.3.dylib` etc should
use `-lglfw`.

Changed this made the compilation on my Mac successfully.

Merge pull request #804 from Loftilus/master ...

Examples: Vulkan: Fix Vulkan example for use when a depth buffer is active.

Fix Vulkan example for use when a depth buffer is active.

Travis test fix

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

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)

Ignore list for Visual Studio

Merge branch 'martty-master'

tabs to space, remove braces

maxImageCount may be 0; add missing sType; change to 1 push constant range

Merge pull request #783 from bear24rw/patch-1 ...

Demo: Add null terminator to ShowStyleEditor() output_type combo options

Add null terminator to ShowStyleEditor output_type combo options ...

Without a null terminator the Combo() function indexes outside of the "items_separated_by_zeros" string.

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()

Merge branch 'thedmd-2016-08-generalized_visibility_test'

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

Merge pull request #756 from jseward/master ...

Examples: SDL: Fix compile warnings.

Fix compile warnings in SDL examples

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

Update README.md