Pica: Implement stencil testing.

Add CiTrace recording support.

This is exposed in the GUI as a new "CiTrace Recording" widget.

Playback is implemented by a standalone 3DS homebrew application (which only runs reliably within Citra currently; on an actual 3DS it will often crash still).

build with visual studio 2015

Fix applet includes using iwyu

GLFW: Switch argument parsing to use getopt.

Visual Studio 2015 defines this in stdio now

Library applet support (swkbd for now)

Applets are now cleaned up in AppletUpdateEvent after calling their respective Update method.

Core: Properly configure address space during binary loading

The code now properly configures the process image to match the loaded
binary segments (code, rodata, data) instead of just blindly allocating
a large chunk of dummy memory.

Currently only the SWKBD is emulated, and there's currently no way to ask the user for input, so it always returns "Subv" as the text.

Common: Fix mask generation in BitField

Tell CMake to install the compiled binaries on Linux.

Add GL_CLAMP_TO_BORDER support.

Travis: Remove use of sudo to enable use container-based builds

Update style rules with to better match current practice.

CMake: Fix Debug build configuration in MSVC

Common: Remove thunk.h

This isn't used, and there's no implementations of the member functions.