Tidying up

Added GetCurrentWindowRead() for functions that don't write to the window

Fixed OpenPopup() accessing current window, effectively opening "Debug" on an empty window stack

Minor internal shortcuts not calling GetCurrentWindow()

Demo: long text example uses ImGuiListClipper

Style: rename ScrollbarWidth to ScrollbarSize (sorry!)

TreeNode() fixed IsItemHovered() being inconsistent with visual behavior (#282)

Split tree/collapsable into internal TreeNodeBehaviorIsOpened() helper (unsure..) (#282)

Examples: OpenGL2/3: save/restore some more state correctly. ...

Might save an hour of staring at blank-screen to 5% of the population,
worth it.

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

TreeNode(): arbitrary interaction padding after text label not part of layout (#282)

Demo: comments.

Examples: Ignore list a little more friendly to Unix systems.

Ignore list a little more friendly to Unix systems

Demo: custom rendering tweak.

IO.WantInputCharacters -> WantTextInput (#305)

Removed default name parameter in Begin() ...

We already have a "Debug" window pushed to the stack in the first place
so it's not really a useful default.

Demo: added a bezier curve in the old custom rendering demo.

InvisibleButton() honor negative size consistently with other widgets that do so

AddBezier()->AddBezierCurve(). PathBezierTo()->PathBezierCurveTo(), and reads current point back, more standard (#311)

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

ImDrawList: added AddBezier(), PathBezierTo() for cubic bezier curves (#311)

Update README.md

Examples: OpenGL: fix for retina screens + io.DisplayFramebufferScale storage (#287)

ImDrawData: added ScaleClipRects() helper (#287)

Malformed UTF-8 don't terminate string, output 0xFFFD (#307)

Added ColorConvertU32ToFloat4() helper and ImColor(ImU32) constructor.

Examples: update readme

Added GetWindowHeight() for completeness + BeginGroup() comment.

Examples: DX9, DX11: mapping missing middle mouse button.