processing time scraper
tests added
documentation added
rollback
added tests
removed lxml from req.
added tests
doc strings and explination
<1 to less than 1 and left 0s
tests updated
data_mapping_key.csv headers
Merge pull request #69 from 18F/processing_times_part1

Processing times part1
Merge branch 'master' into manual_form_data

Conflicts:
	contacts/data/DHS.yaml
	contacts/data/DOC.yaml
	contacts/data/DoD.yaml
	contacts/data/EEOC.yaml
	contacts/data/NASA.yaml
	contacts/data/USDA.yaml