Merge pull request #9 from njoubert/master

SBP: Updating piksi_firmware to work with new libswiftnav
Updating libswiftnav to latest version
with fixes for ecc anom hanging bug.
Update to use TDCP Doppler/velocity.
Check channel is running first before reading its PRN.
Merge branch 'master' of github.com:fnoble/piksi_firmware
Rename README so its recognised as Markdown
Limit maximum solution timer count, closes #11
Merge pull request #13 from fnoble/max_soln_timer

Limit maximum solution timer count
Added test to run F2C arithchk for LAPACK/BLAS settings
Merge branch 'master' of github.com:fnoble/piksi_firmware
Exchange solution plot axes, Lat/Long were switched.