Use ApplicationContext instead of ActivityContext
Update version to 2.0.1
Merge branch 'master' into development
Read appToken and logLevel from AndroidManifest.xml
Implement event buffering
Always send session packages immediately
Add property environment to recognize testing activities
Add pseudo environments unknown and malformed
Add TODOs to markdown files
Add property defaultTracker for preinstalled apps
Attach referrer to each session package
Update README