remove dynd from print_versions
bump version to 0.6.8
update manifest
use requirements in setup.py.  Use setuptools
test for multiple csv files
clean up __init__ imports
list -> set change in csv
bcolz maps str over field names
Symbol -> symbol in server
bcolz: revert compute_down projection change
add pymongo to meta.yaml
update requirements.txt
add pytest to build dependencies
add ooc and csv docs
Merge pull request #883 from mrocklin/ooc-csv-docs

add ooc and csv docs
python: broadcast optimize merge
add queries to docs
separate index into user/internal facing
update install docs
skip doctests in queries