Milestones:

move drivers to drivers/ble
move sphero driver to drivers/serial
move sphero adaptor to adaptors/serialport (UART Support #371 )
~~try to make mavlink to use serialport~~
try to make megapi to use serialport (megapi: use serialport adaptor and move driver to drivers/serial #1062 )
try to make neurosky to use serialport (neurosky: use serialport adaptor and move driver to drivers/serial #1061 )
improve test coverage (ble(client): add scan timout and configure option #1051 )
improve README
fix missing check of err return values in examples ([BLE] can not run the code twice because of this ble error #765 )
add example for serial-port with BLE ([question, ble] go ble-serial #987 )
~~add new drivers or one as example~~

roadmap(ble): implement support for more peripherals #1004

Description