Fix the Japanese glyph range; include Punctuations ...

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

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)

ShowTestWindow() minor tweak

Fixed ListBox() label not included in declared size (fix #151), fixed ListBoxHeader() incorrect handling of SkipItems, Added Exemple

Fixed using IsItemHovered() after EndChild() (#151)

Minor tidying up (more consistently using 'label_size' as a variable name)

Minor tweak

Examples: DirectX examples uses WM_KEYDOWN/WM_KEYUP ...

Fixes pressing Enter in IME being caught by application right after
validating an IME input.

Update README.md

Windows: setup a default handler for ImeSetInputScreenPosFn so IME (Japanese/Chinese) inputs are positioned correctly. ...

User need to set io.ImeWindowHandle

Font: fix for fallback character width.

Examples: Windows examples don't link with imm32.lib by default.

Handle double-width space (0x3000) in various places, for Japanese users.