Many changes here.

Many changes here.
- Make services assembled from .s files in external/services
- Arbitrary service loading now, including a NULL safety toggle
- Drop armips for clever gnu as usage
- Loader can (theoretically) resize segments now, so one step closer
  to building a romfs overlay into loader
- Split function for patches into text, data, ro patches
- Stub IFile_Write - Hopefully I implement it soon, I'd like logging.
- Other misc changes. I forget whether this was the previous commit,
  but I added @TuxSH's RO patch.