Clean up

Unify indentation
Unify comment style
Move private stuff to the bottom of AdjustIo.java
Add constants MAC_SHA1 and ATTRIBUTION_ID
Rename LogWrapper to Logger
Rename eventId to eventToken
Add todo comments
Improve logging, clean up

Split setTrackingParameters call into multiple addTrackingParameter calls
Simplify creation of trackingParameters dictionary
Add customizable logLevels to Logger
Subclass Handler to avoid leaks (http://stackoverflow.com/a/11408340)
Log eventToken and amount of events and revenues
Log malformed eventTokens
Rename TrackingInformation to TrackingPackage
Fix all lint warnings
Remove .gitignore
Merge remote-tracking branch 'origin/clean_up'

Conflicts:
	AdjustIo/src/com/adeven/adjustio/TrackingInformation.java
version bump to 1.5.2