Merge pull request #18 from curiousepic/master

renamed sf_id to sf_contact_id
button updates status in salesforce and clipboard db
generalized date matching
Merge pull request #19 from curiousepic/master

syncer uses chronic to parse dates, year added to Shift
Merge branch 'master' of https://github.com/SEEDlings/clipboard
Merge pull request #20 from curiousepic/master

changed Shift.date from DateTime to Date
Merge branch 'master' of https://github.com/SEEDlings/clipboard
adjusted date rendering to work with chronic date parser
Merge pull request #21 from rlconley/master

Updated volunteer list rendering works with chronic date parser
Added unconfirm, cancellation, no_show actions to shifts_controller
Volunteers index now sorted by last name, all status update actions working