Refactored and updated concurrency example, added some basic threading features for scalability
Added build constructs so concurrency example can be generated
Merge branch 'master' into rw-update-concurrency-example
Update build-distribution.sh
Removed src directory from distribution area
Merge branch 'rw-update-concurrency-example' of https://github.com/Tightdb/tightdb_java into rw-update-concurrency-example
Cleanup the code
Update RealmReader.java
Update RealmWriter.java
Added change to return if user enters bad number
Merge branch 'master' into rw-update-concurrency-example
Merged changes from Brian M
Merge pull request #433 from realm/rw-update-concurrency-example

Updated concurrency example, setup for release and validated the various tests