Update version to 1.6
Rename eventId to eventToken, adeven/adjust#340
Use java highlighted code blocks in readme
Add appToken, remove request parameter app_id

adeven/adjust_backend#148
Add multithreading
Extract PackageBuilder, begin session aggregation
Expand PackageBuilder and SessionState
Use HashMap for parameters
Restructure, refactor, clean up
Extract, refactor
Reduce visibility where possible from public to protected
Move checkPermissions to SessionThread
Merge branch 'development' of https://github.com/adeven/adjust_android_sdk into development

Conflicts:
	AdjustIo/src/com/adeven/adjustio/AdjustIo.java
Update and close some TODOs
Refactor, restructure, rename threads to handlers
Rename SessionState to ActivityState
Rename QueueHandler to PackageHandler
Rename, unify, prepare macMd5
Unify structure, improve logs
Move getRequest to RequestHandler