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
Merge branch 'master' into compute-up

Conflicts:
	blaze/compute/sql.py
docs: replace compute_one with compute_up
Merge pull request #632 from mrocklin/compute-up

rename compute_one to compute_up