Merge pull request #415 from poretsky/proposals

Accessibility improvements
Merge pull request #416 from poretsky/proposals

Fixed accessibility settings persistence.
Fix NPE
Fix altitude correction
Fix android compilation
Update av camera setting
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Fix recorder
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Introduce "Online Tracking" (en + de)
Merge pull request #419 from poretsky/proposals

More content descriptions for graphics widgets
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Hebrew recorded voice update

Hebrew recorded voice update.
*This update solves the critial issue of the word "turn" not said before
"sharp right/left"
*It also add execptions for speaked hebrew (non spoken before) numbers
*fluency in speaking is much improved (with no clicks sound)
Merge pull request #420 from byshai/master

Hebrew recorded voice update. Fix critical issue : say word "turn" before "sharp right/left".