Improve V680 decoder
Fix teltonika speed units
Add unit tests
Add unit test
Fix tlt2h protocol decoder (fix #273)
Support Map Power protocol (fix #225)
Add teltonika unit test
Update Apel decoder
Update Apel decoder
Start GlobalSat decoder
Update GS decoder
Add JT600 unit test
Fix GT06 speed unit (fix #288)
Disable GS unit testing
Finish GlobalSat decoder
Add H02 unit test
Start Atrack decoder
Fix ST210 decoder (fix #310)
Fix V680 decoder (fix #311)
Improve GL200 decoder