Also improve pybsd, and make it save it's pin configuration. This is a necessary step towards supporting the CC3200 low power deep sleep (LPDS) mode.
This is how it should be, so one knows exactly where the includes are coming from.
I2C objects can be freed by the GC and a __del__ method is provided in order to de-init the peripheral prior to being garbage collected. UART objects are now added to a local list and this list is now part of the VM_STATE.
