Cleanup question field, topic & industry filters.
Update topic and industry filters, specs.
Filter multiple industries and topics.
Merge pull request #40 from GovWizely/tim/parature-faqs

Tim/parature faqs
Update Source field in CSL endpoint.

[#81870294]
change null -> nil, only store (alt) annual rates with values, convert those values from array to hash. [81829700]
convert "nil" string to nil object.