Moved IMGUI_FONT_TEX_UV_FOR_WHITE define to a variable so font can be changed at runtime

Fixes to allow clean 1-pixel thick lines in more use cases. PixelCenterOffset not the same as previously!

Fixed ImGuiTextFilter triming of leading/trailing blanks. Documented "Filtering" section of demo better.

Fix type conversion compiler warnings (from dadeos)

Converted all Tabs to Spaces ...

Argh

Exposed CalcTextSize(), GetCursorScreenPos() for more advanced fiddling

Converted all Tabs to Spaces (git diff -w shows an empty diff)

Added global Alpha in ImGuiStyle + commented ImGuiStyle fields in .h

Added InputFloat4(), SliderFloat4() helpers.

Renamed ImVector<> members.

PlotLines(), PlotHistogram(): added a stride parameter.

Added storage for up to 5 mouse buttons for convenience (even though ImGui itself only uses 1)

Added BeginTooltip()/EndTooltip() helpers to create tooltips with custom widgets

Added TextColored() helper. Changed some parameters to const references (still allows implicit casting)

Default "local only" clipboard handler on non-Windows platforms

Undo IsHovered > IsItemHovered, shorter name wins

Tweaks, more consistent #define names

Added GetItemBoxMin(),GetItemBoxMax(), renamed IsHovered()-->IsItemHovered()

Added InputFloat2(), SliderFloat2()

Fix for gcc type qualifier warnings. ...

With -Wall -Wextra -Werror, it is not possible to compile against
imgui.h due to const correctness violation in ImVector.

Simplified ImDrawList system (samples are 20 lines shorter) + merged title bar draw bar.

Fixed warnings for more stringent compilation settings. Added various small helpers.

Missing assert + comments

Tweaked checkbox/radio default hover color to be less distracting. Added GetItemWidth(). Added text filter to style editor.

Added ImGuiCol_CheckHovered to show hovered checkboxes and radio buttons

Commented samples and shuffled bits of the initialisation based on user's feedback.

Added PixelCenterOffset for OpenGL/DirectX compatibility.

Initial release