Add some dev notes.

Change-Id: I2afe45c10c6b5435f77beb9aa8fd6cfbd5b1805b
Reviewed-on: https://code.urbancompass.com:8443/3106
Reviewed-by: Ugo Di Girolamo <ugo@urbancompass.com>
Tested-by: Ugo Di Girolamo <ugo@urbancompass.com>