no index in to_csv
test for num cols in csv export, closes #348
Merge pull request #366 from modilabs/csv-format

Csv format
add distinct as parameter
add distinct show call and docs, half of #341, fixup tests
change distinct to return list per Mongo implemention, not applicable to summary, closes #341
Merge pull request #367 from modilabs/distinct

Distinct
fix distinct docs
set content type to csv for csv show
typo
fix newest, closes #369
set dataset to failed if loading file raises an exception, closes #370
helper for schema check
Merge pull request #373 from modilabs/csv-parse-err-370

Csv parse err 370
Merge pull request #374 from modilabs/fix-newest

Fix newest
move test to update
fix json calc add command
Merge pull request #376 from modilabs/misc-fixs

Misc fixs
check that update can be parse to appropriate types, reject if it cannot, closes #375, maybe #372
typo