Scrollbar: moved from Begin() into its own Scrollbar() function + tidying up

Scrollbar: Clicking inside the grab box doesn't modify scroll. Subsequent movement always relative. (#150). ...

Big change, rather thoroughly tested but hope I didn't break something.

Renamed style.ScrollBarWidth to style.ScrollbarWidth to be consistent with other casing.

Tidying up & Chinese glyph range includes missing punctuation.

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

Fix the Japanese glyph range; include Punctuations ...

ref. #156 https://github.com/ocornut/imgui/issues/156

Scrollbar tidying up variable names

ShowTestWindow: fixed "undo" button of custom rendering applet + default size

Added GetScrollPosY(), GetScrollMaxY() (mentioned in #150)

Added style.GrabSizeMin

Forward declare struct in imgui.cpp. Removed two forward declarations leaking in imgui.h

Scrollbar grab have a minimum size (mentioned in #150)

ShowTestWindow: example apps showing even if main window is collaposed.

Rename ImCrc32() -> ImHash()

GetID() doesn't need to account for empty IDStack

Fixed .ini saving for windows using ### marker. FindWindowSettings() uses ID compares (#107)

Fixed comments

Fixed typo in comments

ShowTestWindow(): Added "Manipulating Window Title" example.

Minor tweaks.

Updated documentation, better FAQ on ids and usage of "##" and "###" (#107)

Added "###" syntax to specify label that isn't part of the hashed ID (#107)

Minor FindTextDisplayEnd() optimisation

Added comments on columns function; Added GetColumnIndex(), GetColumnsCount(), #154

Collapse triangle uses text color (not border color)

AA branch: fixed columns separators.

AA branch: fixed input cursor.

AA branch: disabled border shadow by default.

AA branch: fixed separators, borders, input cursor. - not really sure about this.

AA branch: fixed frame rounding clamping glitch.