Saving progress towards being able to select ignored columns.
Merge branch 'master' into ignore

Conflicts:
	bayesdb/client.py
	bayesdb/parser.py
Merge branch 'master' into ignore

Conflicts:
	bayesdb/engine.py
Resolved merge conflicts
Removed leftover merge conflict text and whitespace
Updated engine and client tests for update schema, especially ignore datatype
Merge branch 'ignore' into dev
Merge branch 'ignore'
Added documentation for the FREQ and HIST keywords
Added explanation of INTO clause when used with SELECT, INFER, and SIMULATE queries
Updated description of LABEL COLUMNS in docs to specify when quotes are required
added help for infer, simulate, select, estimate
Merge branch 'master' of https://github.com/mit-probabilistic-computing-project/BayesDB into help
Merge branch 'dev' of https://github.com/mit-probabilistic-computing-project/BayesDB into help
updated bql.rst for more where clause details
added more help methods
Merge branch 'help' of https://github.com/mit-probabilistic-computing-project/BayesDB into dev
Merge branch 'master' of https://github.com/mit-probabilistic-computing-project/BayesDB into dev

Conflicts:
	docs/bql.rst
set initialize models to default to 16