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.
Updating the pipeline branch again with null checking
add EditJoin
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.
Add a switch between the real amt and the amt sandbox
Updated with new pipeline code
Merge pull request #29 from sjyk/bigpipeline

Bigpipeline
Updated with fixes to the Dedup code
Updated some crowd parts
Merge branch 'bigpipeline'

Conflicts:
	src/main/scala/sampleclean/clean/deduplication/BlockingStrategy.scala
Moved to spark 1.1 deploy scripts.
Tweaks to make crowd server work with internal crowd.