HWRenderer: Added a workaround for the Intel Windows driver bug that causes glTexSubImage2D to not change the stencil buffer.

Reported here https://communities.intel.com/message/324464

IncrementWrap and DecrementWrap, verified with hwtests.

Verified with hwtests.

The HW renderer already did this.

Verified the behavior with hardware tests.

Add coding style about includes

videocore: Added RG8 texture support

Update boost external to v1.59.0

Fix Linux GCC 4.9 build (complaining about undeclared memset)

citra-qt: Improve pica command list widget (add mask, fix some issues)

Shader debugger improvements

Renamed "Iteration index" to the (hopefully) more intuitive "Cycle Index".
Added flexible space at the bottom of the widget.

Introduce a shader tracer to allow inspection of input/output values for each processed instruction.

Now supports dumping the current shader and recognizes a larger number of output semantics.

Handle `FileType::CIA` in `switch` statements

citra-qt: save path for recent files loaded

vfp: use std::swap where applicable

Handle invalid `Log::Class`

Vertex Shader JIT for X86-64