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
PT-878 - Updated shunt module to implement shunt_enable() and shunt_disable() as described in README roadmap, enable a drush interface, and update the configuration path. Updated shunt_api module to prevent memcache problems when shunt is tripped.

	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/shunt/README.txt
	modified:   modules/custom/shunt/modules/shunt_api/shunt_api.module
	new file:   modules/custom/shunt/shunt.api.php
	new file:   modules/custom/shunt/shunt.drush.inc
	modified:   modules/custom/shunt/shunt.module
	modified:   modules/custom/wh_petitions/wh_petitions.pages.inc