Added simple logging library
Merge branch 'hmac-sha1'
removed SHA1 lua implementation and Json4Lua. Requires too much memory. Replaced json.lua with smaller implementation
Set HW flowcontroll to GSM
Initial test on NMEA  parser
Start GPS tracking at boot
Fixed/Removed NMEA location degree conversion
Fix typo and added Juha to contributors
Added session_code to event JSON
Removed Templates from master branch
Initial SHA1 implementation on C
Merge branch 'master' of github.com:RuuviTracker/ruuvitracker_fw