rename compute_one to compute_up

Conflicts:
	blaze/compute/bcolz.py
	blaze/compute/mongo.py
	blaze/compute/pandas.py
	blaze/compute/python.py
	blaze/compute/sql.py
	blaze/compute/tests/test_mongo_compute.py
	blaze/compute/tests/test_python_compute.py
	blaze/compute/tests/test_spark.py
a few more compute_one functions were hiding out
Cleanup
Use pandas.read_csv for CSV._iter
Filter do not change the object
More explicit test
Remove newline in test
Pandas read_csv is imprecise
Implement slicing with pandas
Tuple our input when we have a list key
One more win for pytest
Open up the unicode test; you must specify encoding
Allow passing encoding through
Check for a more specific error
Fail on py3 until we use pandas for discovery
Move a comment
Can't open without a proper gzip opener

TODO: see if this is possible in pandas with the compression='gzip' argument
No more PY3 need
Remove line at BOF
Use standard bool comparison techniques