NUTTX: updated to lastest official release to correct I2C bus and other
VRBRAIN: added module conversion for rotation of sensors
VRBRAIN: removed the use of I2C2
VRBRAIN: updated to the latest official version
VRBRAIN: updated to the latest official version
VRBRAIN: modified drivers for sensors. HMC5883 (I2C) internal and external (GPS) with rotation, HMC5983 (SPI) internal, external (connector EXP or/and connector IMU), MPU6000 (SPI) internal, external (connector EXP or/and connector IMU), MS5611 (SPI) internal, external (connector EXP or/and connector IMU).
VRBRAIN: adjustment of boards to new drivers
VRBRAIN: updated to the latest official version
Merge pull request #3 from virtualrobotix/for_merge

merged