Committee application name change
Files are being renamed to reflect change from committee application to more general volunteer application. Updates to application form to come.
Altering volunteer form so that fields are appropriate, adding drop-down selection for area of interest.
Merge branch 'master' of https://github.com/KimHof/snowdrift into KimHof-master

Conflicts:
	config/postgresql.yml
Interests multiselect on volunteer form.

Closes GH-141.