Minor tidying up following (#516) - renamed ImGuiSelectableFlags_HandleDoubleClick to ImGuiSelectableFlags_AllowDoubleClick + comments

Merge branch 'master' of https://github.com/zapolnov/imgui into zapolnov-master

CaptureKeyboardFromApp() / CaptureMouseFromApp(): allow to enforce clearing the capture flag (#533) + demo + made code a little less messy

InputText: Added BufTextLen in ImGuiTextEditCallbackData. Requesting user to maintain it. Zero-ing structure properly before use. (#541)

Exposed FindWindowByName() in imgui_internal.h

Moved declaration of SetItemAllowOverlap() to imgui.h (ref #517)

Added flag for selectables to handle double clicks.

Cleaned up the top of imgui.h, documenting all types / forward declarations

Added IM_COL32 macros (ref #346)

Added ImGuiWindowFlags_ForceVerticalScrollbar, ImGuiWindowFlags_ForceHorizontalScrollbar flags (#476)

ImDrawList: Added PrimQuadUV() helper to ease custom rendering of textured quads

Drag*, Slider* clarified that keyboard inputs aren't clamped (#413)

ImVector: erase/insert uses Data/Data+Size directly.

Fixed ImGuITextBuffer::empty() - unused in core lib - from being utterly broken

Fixed ImDrawList::AddRect() which used to render a rectangle 1 px too large on each axis., fixed Image(), ImageButton() as well (#457)

Version number 1.48 WIP + Update binaries

Version number 1.47

TODO items. Moved ImDrawList::Clear* methods suggesting they aren't for end-user.

Comments about ImDrawList::PushClipRect

Minor rebranding "ImGui" -> "dear imgui" (#21)

Comments (#449)

Added BeginPopupContextItem() comment (#439)

Added ProgressBar() (#333)

GetColorU32: Comments

Added GetColorU32 helpers (previously internal and misplaced as window->Color())

Comments and missing forward declaration

ImColor: Added SetHSV helper function.

Added ImGuiIO::ClearInputCharacters() superfluous helper.

Renamed Color() helpers to ValueColor() - dangerously named, rarely used and probably to be made obsolete.

Columns: tidying up, moving OffsetT to a ImGuiColumnData structure