Updated installation profile to 7.x-2.0-beta8
PT-831 - updated the Petitions installation profile to build with Drupal core 7.21
PT-873 - Removed clean_mongo, clean_mongo() calls, and added requirement for Mongo 2.2.4.
PT-876 - Updated petitions_data to include an admin form to set base URLs to be used when generating links

	modified:   INSTALL.md
	modified:   README.md
	modified:   UPDATE.txt
	modified:   build-petitions.make
	deleted:    modules/custom/clean_mongo/clean_mongo.info
	deleted:    modules/custom/clean_mongo/clean_mongo.module
	modified:   modules/custom/petitions_data/classes/PetitionLoadMongoRaw.class.inc
	modified:   modules/custom/petitions_data/classes/PetitionsMongoRaw.class.inc
	modified:   modules/custom/petitions_data/classes/SignaturesMongoRaw.class.inc
	modified:   modules/custom/petitions_data/petitions_data.module
	modified:   modules/custom/wh_petitions/wh_petitions.pages.inc