filtering files for code check seperately to enable fast use of git pre-commit hook to check code style
ask user to install pre-commit hook when code style is checked

Working crazyflie firmware build

* Console on USART3
* Could not disable building PX4IO firmware, currently commented out

Don't build PX4IO firmware if the board doesn't ask for it

Added crazyflie motor driver

Fixed wrong register

CLK_SEL is in PWR_MGMT_1

Initial I2C/SPI MPU9250 device

* Tested with I2C
* Need to add error checking
* Intermittent crash on stop call

Working ak8963 mag driver

Functional lps25h driver. Work in progress.

Works well enough to probe and allow sensors task to start.

Added serial port test module

HACK! Get sensors module working

Set crazyflie PWM range

Extend baudrate for Crazyflie's NRF radio

Added dummy tone alarm to allow for init

Added autostart script for Crazyflie

* Path cleanup for SITL.

* Restructured sitl scripts dir.

* Set integration tests to use ekf2 for vtol.

* Fix sitl paths for mac.

This reverts commit 699b6a2c.

* make tests use px4 instead of mainapp

* commander_tests ALTCTL - not rotary requires altitude

sitl CI is having some issue cloning, but I have verified it locally for various configs

The reason for this change is that RPi2 and RPi3 are compatible, and
hopefully all differences coming up can be resolved without ifdefs but
at runtime.

We currently only support Navio2, so let's fuse the two configurations.

For replay with the new logger, we want a separate build dir so that the
parameters file and orb rules don't get mixed up.

* move gcc 4.9 build to circleci

* travis-ci update to xcode 7.3

* travis-ci limit git fetching for OSX

* Makefile split firmware targets for CI

* OSX ccache

* Add parrot bebop build structure

* Add upload functionality to bebop build

* Add modules and commands to bebop build

* Insupport merging Spread the checks multiline lists

* Removed long line of checks