Changed the way that RuTextToSpeech gets the Context
add simple encryption utils
use nowrap on the HMAC
add UploadManager to constructor of Uploader, add method for uploader to read private data
move client secrets into assets
remove accidentially committed work-in-progress code
mark some assets binary
cleanup + add a first version of trimActivity, which removes redundant trackpoints from an activity
merge from upstream and cleanup of RuTextToSpeech