Added am:app service stub.

Apparently nothing at all is known about this service...
Added stub for ldr:ro service...
Added stub for cecd:u service...

I couldn't find any information about this service...
Added stub for nim:aoc service...
Merge pull request #282 from archshift/services

Added stubs for ldr:ro, cecd:u, nim:aoc, and am:app services
Update README.md
Update donation info
Provide a direct webchat link to #citra in the Readme
More Readme updates.
Update README.md

Fix spelling mistakes.
Properly erase/remove an observer
citra-qt: static-constify a map.
BitField: Add an explicit Assign method.

This is useful when doing crazy stuff like inheriting from BitField.
Pica: Initial support for multitexturing.
citra-qt: Fix invalid memory read upon program startup.

This was caused by the framebuffer display widget not checking whether we are actually in a valid emulation state or not.
Pica/DebugUtils: Add support for RGBA8, RGBA5551, RGBA4 and A8 texture formats.
Pica: Implement texture wrapping.
Pica: Merge texture lookup logic for DebugUtils and Rasterizer.

This effectively adds support for a lot texture formats in the rasterizer.
Pica: Further improve Tev emulation.
Pica: Unify ugly address translation hacks.