add S3 get function to get the content of S3 bucket to local folder
make virtualenv deb for luigi
add S3#get to cp the content of S3 bucket to local
since script_parameters returns a dict, encode it as such
fix recursive delete to use correct cmd

Tested on hadoop 1.0.3 on EMR.
bumped version to 1.0.17-q2

where 'q2' refers to quixey's changes
no longer needing S3 keys in pig scripts
Run pig with -c flag