GPU/Loaders: Log an error when a loader tries to load from a component beyond the available ones

GPU/Loaders: Log an error when a loader tries to load from a component beyond the available ones (12).

Related to #1170

pkgbuild is now provided by Travis itself, so homebrew throws
an error upon trying to install it.

CMake recently 302'd the download URL we're using.
To prevent any issues, just follow the redirect with cURL.

Added CSND_ExecuteType0Commands stub.

Implement FS_User::GetFreeBytes

Add GetTotalStepCount Stub

citra-qt: Change file path encoding

GLSL Fragment Shader Generation

- Also add a comment to AppendColorCombiner.

- Includes a check to confirm no hash collisions.

- Fixes uniform issue on AMD.

- Alpha testing is not done with float32 precision, this makes the HW renderer match the SW renderer.

to support non-latin characters

citra-qt: save hardware-rendering and shaders-jit settings

citra-qt: Add icon to the OS X app

Loader: Implement NCCH encryption check

Before this changing these settings from the GUI would apply the
settings, but they were reseted to the default values when exiting
citra.

Previously the Mac app didn't have any icon.