add Iterator to __init__
bcolz: append goes through chunks(np.ndarray)
bcolz drop
discover(csv) uses notnull to determine option-ness
append chunks to SQL
relax sql resource function
Merge branch 'master' of github.com:ContinuumIO/into
discover csv bump to 1000 rows
Merge branch 'master' of github.com:ContinuumIO/into