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.

Examples: Fixed Makefile

Examples: Fixed Makefile

Examples: Fixed Clang warnings in DirectX examples

Examples: MSVC: increase warning level from /W3 to /W4 for OpenGL examples

Examples: MSVC: increase warning level from /W3 to /W4 for DirectX examples

Examples: Fix includes order to avoid conflicts between DXSDK_DIR and Windows SDK

Examples: Added 64-bit projects for MSVC

Examples: Moved GLFW/GL3W to a common libs/ folder

Examples: Updated to GLFW 3.1

Added io.KeyAlt + support in examples apps ...

Currently unused but supported by sample so that more people will have
it set up when menus needs them

Examples: reference implementations honors drawlist user callbacks.

Examples: README direct the user to the opengl_example

Examples: OpenGL 2/3 examples cleanup to match DirectX9/11 structure.

Examples: DirectX9 example cleanup to match DirectX11 structure.

Examples: DirectX11 example application handles window resizing.

Examples: DirectX9 example application handle window resizing.

Examples: Fixed readme file.

Examples: Refactored directx11_example to be easier to copy & paste into user application.

Examples: Clang warning fix.

Examples: Makefile fixes.

Examples: Clang/Linux warning fixes.

Examples: Tweaks.

Examples: Refactored directx9_example to be eaasier to copy & paste into user application.

Examples: shallow tweaks to match upcoming other examples.

Examples: Rename globals again

Examples: Moved gl3w to opengl3_example directory + fixed msvc project paths