Fix bug on SettingsActivity not checking Time Interval
SettingsActivity allows time interval as long as it is greather than 300 seconds
Remove unused distance interval from Settings
Use ApplicationConstants.DEBUG in Log and showing toasts. See #20
Display default map layer when application starts
bump version to 2.0.0
Upload 2.0.0 to GooglePlay
Update screenshot for 2.0.0
Fix #21 bug when sending SMS on Android 4.4 for KitKat