Port of GPS modifications from SVN
Fix problem with GPS speed unit used with voice
Compilation error
Speed unit in logs depending on imperial parameter
Merge branch 'next' of https://github.com/opentx/opentx into bsongis/Issue524_SPORT_GPS

Conflicts:
	radio/src/translations.h
Merge branch 'next' of https://github.com/opentx/opentx into bsongis/Issue524_SPORT_GPS
Units in all languages
DE translations
Ignore list updated
Issue #767 - Extra Pot (S3) support
Update DONATIONS.txt
Issue #767 - Companion part
Vario didn't stop beeping when in sink mode
EEPROM conversions problems
Issue #534 missing control
Update DONATIONS.txt
Issue #731 - Conversion issues (Inputs) fixed
Issue #731 fixed - Default mixes/expos created on an empty model
Conversion of °C->°F on HDG
Altitude stored as feet in logs when imperial mode chosen
Merge remote-tracking branch 'origin/next' into
bsongis/Issue524_SPORT_GPS

Conflicts:
	radio/src/telemetry/frsky_sport.cpp
	radio/src/translations/de.h.txt