Initial WIP of javax.scripting support for hive udfs
Add support for HDFS file based scripts
Clean up the code a little and minor refactoring to get ready for the UDAF version
Lots of refactoring and adding an initial UDAF
Help doc for scripted UDAF and minor code cleanup
Snapshot with a working, but not documented UDF and a documented, but not working UDAF
Lots of documentation updates
README update for scriptedUDF
Update CDH version
Minor readme formatting fix
Doc update
Fix null handling in the rank function
Add sha1 and minor code cleanup
New hash based random number UDF
ZTest: use implementation from commons-math

commons-math provides a better implementation of this functionality, and
is already a project dependency.