Refactored IntentService classes and their Dagger modules
Fixed simple bug with call to startActivity
Cleaned up some redundant code
Small edit of Notification text
Added check of whether package already exists
Used constant PACKAGE_NAME rather than method parameters
Removed a redundant Context parameter
Added getPackageVersion method
Set PACKAGE_NAME to com.wandera.testflight
Renamed and expanded ApkInfo stuff and adjusted regexps
Added and used class for comparing newest vs installed version numbers
Fixed regexp stuff in VersionComparer