Better attitude filter, not sensitive to sudden accelerations
Removed unused files
Merge branch 'master' of github.com:PX4/Firmware into attitude_filter_improvement
Merge remote-tracking branch 'upstream/master' into attitude_filter_improvement
Fixed test outputs, decoupled tests from NuttX low-level output via message() macro
Reduced, but functional u-blox series driver
Disabled old-style gps interface, enabled GPS driver
Tuned GPS update rates
Fixed typo
Minor quick cleanups
More cleanup
Minor polishing, fixed rate and last measurement indication
Merged with newer, cleaned up code, fixed the checksum error
Small corrections
Added option to select port name, minor tweaks to status printing, sacrificied 20 bytes for better status / user debuggability
px4io: make uploader more reliable

avoid seeks, lower verify recv size and removed cruft
Update on every position change, do not wait for other measurements
Changed parse interface, differentiation between config needed and position updated, working but might be solved more elegant
Changed gps position topic mostly to SI units and float, removed counters and added specifig timestamps
Removed some unnecessairy flags, home position back working