add PassJoin
add Edit Distance first attempt
add EditDistance class; extends PassJoin
Merge branch 'master' of https://github.com/sjyk/sampleclean-async into changes_Juan

Update code.
Merge branch 'master' of https://github.com/sjyk/sampleclean-async into changes_Juan

Merge with demo interface.
Added spark deploy scripts, with a wrapper script to set AWS credentials for sampleclean.
Documented deploy process in deploy/README.md
See 'sampleclean' branch of github.com/thisisdhaas/spark-ec2 for installation/setup scripts.
add EditJoin
Renamed jar to avoid spaces.
Added instructions for running code on the cluster to the README.
add documentation for Edit Distance
Merge pull request #27 from sjyk/changes_Juan

Changes juan
Path fixes in README.
Added cluster destroy usage to deploy readme.
Merge branch 'master' of https://github.com/sjyk/sampleclean-async into real_amt
make crowd server ready for experiments on real amt