1k resistor needed to put between the buttons and the ground

comments added to bluetooth lib

util lib extended with delay and timeout functionalities

old IMU lib replaced with new one

halfword fifo is not possible because DMA controller only copes with little-endian addressing

main cleaned up and half word fifo added to i2c - need to fix

i2c dma fifo enabled

uart dma init cleaned up a bit

imu datasheets added

minior fix with bluetooth module lib