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

Version number 1.43 WIP ...

Bits

Disable warnings, undo f4aae6b (#265 #266)

fix minor clang-x64 warnings ...

fixes #265

Version number 1.42

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

Allowing DeltaTime==0.0f to not assert

Fixed clang/gcc warnings (#133)

AA branch: undo d35c1a9, thickness is back but goes through non-AA path (#133)

AA branch: more comments on breaking changes (#133)

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

AA branch: removed the 'thickness' parameter from ImDrawList::AddLine()

AA branch: API breaking change documentation

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

Columns/ImDrawList: dispatch render of each column in a sub-draw list and merge on closure, saving draw calls (#125)

Fixed ListBoxHeader() not honoring negative sizes the same way as BeginChild() or BeginChildFrame() (#263)

More debug-build friendly ImVector<> use micro optimisations for the most bottle-neck bunchs

AA branch: further use of ImVector<> Data/Size

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

Conflicts:
	imgui.cpp

ImVector<> access to Size/Capacity/Data (#262)

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?

Fixed minor zealous Clang warning (demo code intentionally uses strdup() to be copiable)

Metrics window: "Show clipping rectangles when hovering ImDrawList" enabled by default

ImRect (internal) fixed ImVec4 constructor, argh (broken e7e2fcd)

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

Optimisation, removed the duplicate ClipRectStack in ImGuiWindow, storing single value

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.

ImRect (internal) made constructors more non-optimised compilation friendly

ImDrawList: fixed non-merged commands when equal clip rectangles are in the two first commands