Merge remote-tracking branch 'origin' into 2015-04-indexed-rendering

Examples: DirectX9/11: hide os curosr if ImGui is drawing it (#155)

Examples: DirectX9/11: Fixed key mapping for down arrow.

Merge remote-tracking branch 'origin' into 2015-04-indexed-rendering ...

Conflicts:
	imgui.cpp

Examples: OpenGL3: backup/restore current program and texture #195

Set modifier key state by inspecting imgui's io.KeysDown array.

Merge remote-tracking branch 'origin' into 2015-04-indexed-rendering ...

Conflicts:
	examples/directx11_example/imgui_impl_dx11.cpp
	imgui.cpp

Examples: Simplified GLFW keyboard callbacks

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

Simplified glfw keyboard callbacks.

Examples: DirectX11: tidying up.

Merge remote-tracking branch 'origin' into 2015-04-indexed-rendering ...

Conflicts:
	examples/directx11_example/imgui_impl_dx11.cpp
	examples/opengl3_example/imgui_impl_glfw_gl3.cpp

Examples: OpenGL3: Tweaks (argh, github ui)

Examples: OpenGL3: Tweaks.

Examples: DirectX11: Removed unnecessary vertices conversion and CUSTOMVERTEX types.

Indexed rendering. Not in main branch because breaks rendering code too much. Will merge in trunk along with more major graphics changes lat

Examples: Formatting #187

set pixel shader and vertex shader to NULL ...

Previous graphic render may use shaders,so set pixel shader and vertex shader to NULL to force use fixed pipeline.

Update README.txt

Examples: OpenGL fixed-pipeline: added glBindTexture(0), via Anton M

Fixed modifier key state setting in GLFW callbacks.

Examples: initializing float + missing comment.

Comments on font loading, fixed commented out paths and added DroidSans in the list

Examples: Terser code + added commented out glUseProgram(0( suggestion in OpenGL2 sample.

OpenGL/GLFW: hide system cursor if imgui is soft-rendering cursor

typo ImGui_ImplGlfwGL3_KeyCallback()

Examples: uses SetNextWindowPos/SetNextWindowSize when applicable

Removed extraneous spaces

opengl3+opengl example: if content window doesn't have focus, tell ImGui we don't have a mouse position. e.g. avoids tooltips popping up in imgui app when you're interacting with a different app window that overlaps it.

Examples: DirectX9: fixed duplicate creation of vertex buffer. Size of static vertex buffer at top of the code.