V 2.2.1 - IMU, script tests, change camera resolution config order (#179)

* add tests for donkey script commands (incomplete)

* added part for mpu6050 imu

* added poll delay to imu part

* added keras imu pilot and model def

* added comments for training imu model. added tests

* added imu docs

* update documentation for donkey2 manage.py commands

* fixed tub path discovery

* changed order of camera resolution parameters tobe height x width

* fix js double thread launch. hot load js

* fix camera resolution mismatch

* fix imu run. eliminate def delay on js

* add tests for running scripts

* fix script tests for py34

* version increment