add local.properties to .gitignore
rename sdk build.xml to maven-build.xml
complete unit tests for sdk; removed reliance on OpenUDID; many bug fixes w.r.t. multithreading/concurrency and possible data loss or corruption; check response code and response JSON before assuming success in submitting data to server; don't send negative session duration to server; verify & sanitize input; split each class into its own .java file; Android library project; use nanoTime instead of currentTimeMillis for tracking session duration; set timeouts on network operations; added license header to sdk source files; use Executors instead of timer or thread; send oldest timestamped events first; handle DisplayMetrics.DENSITY_400 in DeviceInfo.getDensity; better handling of NaN/infinity in event sum; JavaDoc for most SDK classes & methods; don't allow activityCount to go negative
android build.xml file
update Android manifest and remove maven/pom files
remove manifest file, one is generated when the jar is built
delete unneeded ant.properties file