Added io.MetricsActiveWindows counter (#213)

ImFontAtlas: doesn't clear input data, left to the application. (#224)

ImFontAtlas: Fix toward allowing to add extra font without clearing existing one (need to comment out ClearInputData) (#224)

ImFontAtlas: added ClearFonts(), making the different clear funcs more explicit (#224)

Window title text centering tweaks, RenderTextClipped() now has different args for pos_max and clip_max #222

Added window title text horizontal alignment option (#222),, ImGuiAlign_ type for future use.

Tweaks, comments around ImFontAtlas ...

Removed unsigned int from API

Cleanup, merged duplicate code into a function

Merge pull request #218 from paperManu/inputNFlags ...

InputFloat2/3/4, InputInt2/3/4: Added extra_flags parameter.

Renamed flags to extra_flags in last commit

Input text flags added to InputFloatN and InputIntN

Example fix PopStyleVar on Vertical Slider to avoid assertion ...

Adding an explicit ImGui::PopStyleVar to avoid assertion in
CheckStacksSize

InputText: make sure Ctrl+V has ONLY the control key pressed (follow up to #214) + tidying

Untabifiy

* make sure letter-key shortcuts have ONLY the control key pressed (fixes bug for AltGr->Ctrl+Alt on windows)

Shutdown() test for g.IO.Fonts not being NULL to allow workarounds in case of using multiple contexts #207

Added style.ScrollbarRounding #212

Merge remote-tracking branch 'origin' into 2015-05-menus

Assert on modifiers stack size mismatch between Begni()/End() pairs #204 ...

Experimenting with this. It's helpful but not happy with the idea of
ImGui asserting on that sort of user error.

Examples: test for tooltip over popup.

Allow stacking popups, not really useful yet (wip #126)

Added ImGuiSetCond_Appearing to test the hidden->visible transition.

MenuItem() draft for popups, with Selected option (wip #126)

Tweak RenderCheckMark()

Added RenderCheckMark() helper following the font size ...

Pretty ugly, not sure what's the right way to solve that automatically,
better shown as an "icon" so it doesn't have to necessarily look like
the font.

Comments (#209)

Fix "Debug" window stealing focus/popup #208 #209 @thevaber

Removed inline marker #210

Removed style.AutoFitPadding, using style.WindowPadding makes more sense (the default values were already the same).

Autofit cancel out one worth of vertical spacing for correct symmetry (group and tooltip already do that)