* Add Serial and GPIO registers and implement embedded_hal traits
Use VolAddress and phantom_fields to populate the SIOCNT, RCNT, and
SIODATA8 registers. Implement embedded_hal serial traits around an empty
SioSerial struct.
Hide serial read and write traits behind a "serial" feature flag
to make embedded-hal and nb dependencies optional.
* UART echo example
Enable the serial feature for this example. Provide a pinout
diagram to assist people with wiring up a USB to UART adapter.
* mGBA output wasn't resetting its length used
* admonish people to stay updated
* IWRAM fix
* version bump
* fix to work with latest nightly.
* don't know what this is or why we have it
* Delete the builtins module
The `__clzsi2` function is now part of the compiler-builtins crate, so it's part of all of Rust.
* ??
* mgba 0.7 came out!
Some day we can split the software math into its own crate and do quickcheck there, until then the test code must be fully no_std because otherwise the examples won't build (sadly, dev-dependencies applies to both tests and examples)