Added ImGuiWindowFlags_ResizeFromAnySide flag and code to resize from any of the 4 corners (only 2 corners enabled). (#822)

Merge branch 'master' into drag_and_drop

Merge branch 'master' into navigation

ImVector: Added ImVector::push_front helper.

Horizontal mouse wheel support ...

This patch adds support for the horizontal mouse wheel in ImGui. It
affects windows that can be scrolled, as long as the Ctrl key is not
being pressed.

The scrolling speed has been set empirically so that it matches the
scrolling speed on the Firefox browser when the horizontal wheel is
used.

Internally, it adds a MouseHorizWheel to ImGuiIO, which is then used in
NewFrame to scroll the current window.

The SDL/GL2, SDL/GL3, GLFW/GL2 and GLFW/GL3 examples has been modified
to use it.

ImGuiTextBuffer: Renamed append() helper to appendf(), appendv() to appendfv(). Added reserve().

ImGuiStorage: Added BuildSortByKey() helper to rebuild storage from stratch.

Merge branch 'master' into navigation ...

# Conflicts:
#	imgui.cpp
#	imgui_internal.h

Exposed ImDrawCornerFlags, replaced occurences of ~0 with an explicit ImDrawCornerFlags_All. Inversed BotLeft (prev 1<<3, now 1<<2) and BotRight (prev 1<<2, now 1<<3).

ImDrawList::AddImageRounded: removed PrimDistributeUV declaration, fixed coding style, restored argument order from original PR. (#845)

Merge branch '2016-08-rounded-image' of https://github.com/thedmd/imgui into thedmd-2016-08-rounded-image

Added comment to help people dealing with 58345b1 breakage (#707)

Add AddImageRounded() to ImDrawList

Merge branch 'master' into drag_and_drop

Merge branch 'master' into navigation ...

# Conflicts:
#	imgui.cpp
#	imgui_demo.cpp

Style, Begin: removed ImGuiWindowFlags_ShowBorders window flag. Borders are now fully set up in the ImGuiStyle structure (see e.g. style.FrameBorderSize, style.WindowBorderSize). Use ImGui::ShowStyleEditor() to look them up. (#707, fix #819, #1031, ref #1019, ref #447)

Reorder fields for consistency.

Style: renamed ImGuiCol_ChildWindowBg to ImGuiCol_ChildBg. (#707)

Minor tweak, removed extraneous empty destructor.

TreePush with zero arguments was ambiguous. Resolved by making it call TreePush(const void*)

NewFrame() now asserts if neither Render or EndFrame have been called. Exposed EndFrame(). Made it legal to call EndFrame() more than one. (#1423 etc.)

Merge branch 'master' into navigation (with style breakable) ...

# Conflicts:
#	imgui.cpp
#	imgui_draw.cpp

Merge branch 'master' into drag_and_drop

Added comment about TextUnformatted(). (#1450)

Style: Added PopupRounding setting. (#1112)

Style: Added a default StyleColorsLight(). (#707)

Style: Removed ImGuiCol_ComboBg in favor of combo boxes using ImGuiCol_PopupBg for consistency. (#707)

Style: renamed style.ChildWindowRounding to style.ChildRounding, ImGuiStyleVar_ChildWindowRounding to ImGuiStyleVar_ChildRounding.

Merge branch 'master' into drag_and_drop

Merge branch 'master' into navigation