Blank slate

Old/mixed up code. Better to start fresh and use the common resources
properly.

Change-Id: I77bde0c7a6f31644310ada07ad7ad96cdbcda6c9
Initial callisto support (second try)

* Used tass LDPI repository as reference for initial commit
* Override BOARD_BML_BOOT and BOARD_BML_RECOVERY to use proper
  partitions (bml9 and bml10, respectively)
* Install custom parts.rc to ensure that proper Bluetooth firmware
  is used (BCM2049B0)

Change-Id: I3cd45aa69354cdba5e347ca90427482c4b982169