Don't crash if NFC not available.

Useful for testing in emulator.
Fix NPEs when reading unauthorized classic card.
Bump version to 2.4.1 (18) for Play Store release.
Clipper: Add 12th Street Station, Oakland
Added support for HSL "Matkakortti" cards (Finland)
Switch to gradle! Update dependencies! Use new maps!
Bump version to 2.4.2 (19).
Remove old eclipse files.
Add Crashlytics, update dependencies and gradle.
Support Washington State Ferry ORCA transactions.
Fix map zoom level when only displaying one point.
Display ORCA in/out taps as single trip.
Added Edy card support
Merge remote-tracking branch 'remotes/origin/master' into experimental