Print out z matrices as text by default, and fix a missing import statement.
clean up docs
Merge branch 'master' into postgresdev
Add first pass at setup.py
update requirements.txt to make it clear that BayesDB depends on crosscat
Add basic implementation of estimate columns
Enforce that no BQL commands return just an integer
Passing select test
update datatypes test passes
Passes create models test.
Test analyze passes.
Test simulate passes.