Updated uploading API to version 2 with checksum
Removed logging messages, auto formatting, removed properties (only
api_properties now)
Changed name of library from GiraffeGraph to Amplitude
Updated README.md with link changes as well as minor rewordings
Added revenue event
Added example in revenue method, spacing auto adjustment
Removed modification of properties JSONObject from addBoilerplate
Added event removal once database gets too large
Added asynchronous uploading on seperate thread
Only one upload happens at a time
Changed ordering of methods in file
Changed updateScheduled to atomicBoolean to reflect functionality
Upload up to 100 events by default
Upload rest of events on successful upload
Fixed bug in getNthEventId
HTTP thread called earlier to reduce waiting times for saving events
Renamed event upload threshold constant
Fixed SQLiteDatabase cursor not closed issue by closing it
All methods that use context in initialize now use the global app context
Default userId to deviceId if userId is not present
Calling startSession and endSession now also trigger uploading of events
Added additional information about where to call session methods in README
Fixed wording in README