Enable / disable logging while running, enabled black box logging (ringbuffer needed), enabled GPS KML logging (does not yet write outputs)
Bringing back old I2C code, just temporary workaround
First round of testing successful - back to I2C code from Dec / Nov 2012
Merge pull request #168 from PX4/i2c_workaround

I2C driver workaround for NuttX
Merge branch 'master' of github.com:PX4/Firmware into log_improvements
Fixed a number of smaller issues with log changes, ready to merge