Merge branch 'chibiupgrade' aka A LOT
Upgraded to ChibiOS 2.6.1 -- this fixed some HAL problems in debug mode
-Datasources now name the types required for more-easily defined listeners
-Fractional types introduced; hopefully let sensors use those soon
-An awesome logger GUI tool now exists, supporting fairly arbitrary datatypes
-There's a pressure sensor now!
-The sensor display utility is much more robust (if that matters)
-Fixed a bug in the LED GPIO configurations
-Increased stack size for UI thread
-Updated FLogFS link to incorporate some bugfixes