Update Breaking Change section with moved misc/fonts/ (#1631)

FAQ about backslashes in string literal since the one in main.cpp isn't being noticed enough. (#1397)

Initialization happens during CreateContext(), which makes it easier for platform layers to interact with the context during their initialization.

Merged a bunch of small inconsequential things from my work branch, to reduce the diff noise.

Nav: Tweak windowing highlighting for full viewport windows.

Obsoleted the io.RenderDrawListsFn callback, you can call your graphics engine render function after ImGui::Render(). Use ImGui::GetDrawData() to retrieve the ImDrawData* to display..(#1599) ...

Examples: Updated examples.

Fixed GCC zealous warnings (#1623)

Plot: plot a flat line if scale_min==scale_max (#1621)

Comments (#1230, #1611)

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

__cdecl markup for non-standard calling conventions via MSVC

Internals: Moved some of NewFrame() into UpdateMovingWindow().

Added IsAnyMouseDown() helper. ...

Examples: DirectX9/10/11: Using IsAnyMouseDown() instead of local function.

Internals: Clarified internal storage for RootWindow with specific semantic (the Docking branch will need to introduce finer differenciation there.)

Warning fix. (#1565)

Updated version to 1.60 WIP to emphasis on the addition of required calls CreateContext/DestroyContext + merged the massive Navigation branch (#1565, #787)

Merge branch 'context' ...

# Conflicts:
#	examples/allegro5_example/main.cpp
#	examples/directx10_example/main.cpp
#	examples/directx11_example/main.cpp
#	examples/directx9_example/main.cpp
#	examples/marmalade_example/main.cpp
#	examples/opengl2_example/main.cpp
#	examples/opengl3_example/main.cpp
#	examples/sdl_opengl2_example/main.cpp
#	examples/sdl_opengl3_example/main.cpp
#	examples/vulkan_example/main.cpp

Nav: Documentation tweaks. (#787)

Nav: Keyboard is now automatically mapped based on io.KeyDown[]. (#787)

Nav: Toward automatically mapping keyboard input. Renamed ImGuiNavInput_PadXXX to ImGuiNavInput_XXX. Renamed ImGuiNavInput_KeyXXX to ImGuiNavInput_KeyXXX_ (internal). (#787)

Nav: Comments, guides.

Merge branch 'master' into context

Merge branch 'master' into navigation ...

# Conflicts:
#	imgui.cpp
#	imgui_internal.h

Drag and Drop: TreeNode as drop target displays rectangle over full frame. Added optional internal storage for item display rect. Will expose later. (#1597, #143)

Internals: TreeNode: Renaming local to be more consistent with other widgets.

Internals: Refactored bool LastItemRectHovered into flags. (#1597)

Nav: Comments, removed extraneous parameter.

Nav: SetItemDefaultFocus() doesn't make the navigation cursorr highlight visible. Renamed NavInitResultExplicit to NavInitRequestFromMove. (#787)

Nav: Sliders and Drags are toggle activated instead of requiring user to cross Cross/Space. (#787)

Nav: DragBehavior: Tweaks (to take the noise out of the next commit).