Merge pull request #79 from falconed/master

added a missing command line option in example/historic_data_cli
remove the limit => 1 on boolean columns, which breaks migrations for postgresql with the error:
PG::Error: ERROR:  syntax error at or near "("
LINE 1: ...ume" integer, "trades" integer, "has_gaps" boolean(1), "time...
also removed the limit => 1 from boolean columns in schema.rb