updated docs for new rake task for delayed job, and the 0.21 tag for updating and installing
when installing from fresh, we now describe installing with git rather than mercurial
added ability to cancel during the signup process which results in the user being removed and logged out. SYSMO-1658
update docs and scripts to use ruby 2.1.3 for installation
Added tag v0.21.0 for changeset 3888a96694bb
update tags
Merge seek-0.21 from mercurial into seek-0.21

Conflicts:
	.hgtags
Merge branch 'seek-0.21'

Conflicts:
	.ruby-version
	script/build-cruise.sh