hid.cpp: Fixed crash when updating pad data while null

Add a Doxygen configuration file to generate source docs

Add override keyword where appropriate

vfp_helper: Get rid of integer type redefinitions

This was automated using `clang-modernize`.

bit_field: Fix a typo in the sample usage.

Removed some uses of raw c-string manipulation functions.

SkyEye dyncom interpreter

Added license header back in. I originally removed this because I mostly rewrote the file, but meh

Fixed typo (make protected member public)

Added license header back in. I originally removed this because I mostly rewrote the file, but meh

ARM: Fixed a type error in dyncom interpreter.

ARM: Updated dyncom to use unique_ptr for internal ARM state.

Removed s_ prefix

Don’t fail on empty filename in OpenFileDirectly, return the archive handle instead

Use config files to store whether SDMC is enabled or not, auto-create SDMC dir.

Use std sized types instead of platform specific typedefs

Before, it used to use whether the directory actually existed. As a result, .citra-emu/sdmc was never auto-created (something quite confusing to me until I read through the logs).

Only check OpenGL shader log if size is >1.

This prevents a crash when the buffer size returned by the driver is 0,
in which case no space is allocated to store even the NULL byte and
glGetShaderInfoLog errors out.

Thanks to @Relys for the bug report.

emu_window_glfw.cpp: Fixed graceful quitting

In PR #143, the name of the function IsOpen was originally ShouldClose, but was changed. The function's caller was changed to reflect this, but the return value wasn't.

Implemented graceful closing of the GLFW window, along with emulation.

Fixes #137

OpenGL Refactor

This should fix context creation on OS X. Also requests a core context on all platforms in Citra-GLFW, for consistency.

The OpenGL renderer has been revised, with the following changes:
 - Initialization and rendering have been refactored to reduce the number of
   redundant objects used.
 - Framebuffer rotation is now done directly, using texture mapping.
 - Vertex coordinates are now given in pixels, and the projection matrix
   isn't hardcoded anymore.

This name better represents what the enum does, and is less overloaded
in the context. (The whole register the enum is part of is also called
'format'.)

Also make destructor virtual so that instances are properly destructed.

Fix warnings in video_core