Merge pull request #5 from leetrout/master

Check for database driver before attempting connection
python3 compatibility effort
python3 compatibility effort
python3 compatibility effort
Syntax error fixed
Merge pull request #8 from stonebig/patch-1

python3 compatibility effort
Merge pull request #9 from stonebig/patch-2

python3 compatibility effort
Merge pull request #10 from stonebig/patch-3

python3 compatibility effort
boto now optional
Merge pull request #12 from yhat/noboto

boto now optional
limit schemas. adding in redshift/s3 stuff
bump
docstrings
python3 nonsense
formatting & s3
better reqs
bump
license
license
bugfix for syntax