* .
* more updates, much more to do soon.
* hello world works again.
* fix key interrupts.
* remove the old book
* don't forget timers.
* we can just use search, duh.
* cleanup
* more bios
* finished most mmio, finished bios.
* dump some old macros that shouldn't have been pub to begin with.
* Update README.md
* for now, just make this a u16
* timers
* fix hello_world
* timer fix
* docs on timers
* block resetting work ram for now.
* put preserves_flags on bios calls as appropriate
* add a code page 437 tile sheet.
* docs.
* sound :( it's all bad but we'll fix it in 0.5
* move most backup files back into the lib.
* CI might work now?
* fix up non-serial examples.
* oops, gotta check out the repo.
* readme.
* Add IntelliJ workspace files to the .gitignore.
* Add a simple make_example script for Linux.
* Create a `sync` module with many GBA-specific sync utilties.
* Fix overflow error in debug mode in the hello_world crate.
* Fixes to DMA.
* Code cleanup for the sync module.
* Run rustfmt on new sync code.
* Fix up some names and documentation in the sync module.
* Add a few changes suggested by thomcc for the locks.
* Added needed compiler fences to `InitOnce::try_get`.
* Change the error in `RawMutex::raw_unlock` to better reflect the cause.
* Add a proper issue link to the __sync_synchronize hack.
* Disable interrupts during `InitOnce::try_get`.
* Fix some bad wording in the comments for `InitOnce::try_get`
* Use the new target in `cfg` checks to see if we're on GBA.
* Change registers used for transfer_align4_arm for the different target.
* Cleanup on sync_api changes for the target change.
