Merge pull request #1289 from lilvinz/pios_queue

Pios queue
PIOS MPU9250: fix typo for pios_thread
Merge pull request #1310 from peabody124/pios_mpu9250_fix

PIOS MPU9250: fix typo for pios_thread
ChibiOS: Pristine import of v2.6.3
ChibiOS: fix GPIOv2 conflict with st libs GPIO_TypeDef
ChibiOS: disable stm32f30x usb irq relocation for legacy compatibility
pios_semaphore: add ChibiOS implementation
pios_mutex: add ChibiOS implementation
pios_thread: add ChibiOS implementation
pios_queue: add ChibiOS implementation
pios_com: add support for ChibiOS
pios/common: add support for ChibiOS
GenericI2CSensor/i2c_vm: add support for ChibiOS
System: add support for ChibiOS
pios/common: add pios_freertos_transition
pios/stm32f4xx: add pios_freertos_transition_priv.h
pios/stm32f4xx: add support for ChibiOS
pios/stm32f30x: add support for ChibiOS
all flight: use pios_heap
pios_mpu6000: use worker thread