Add --rc description on the command line
Added test:all and test:all:db tasks to speed up full test runs.

Speed up depends on the number of test phases (N) you have for your
app, but it is roughly a 1/N improvement. In my app, it goes from
15.51s to 5.56s.

Inspired by http://ngauthier.com/2012/02/quick-tests-with-bash.html

Reviewed by @tenderlove
Update upgrading guide with ActionDispatch::BestStandardsSupport removal
Fix regex to strip quotations from hstore values

Previously regex did not strip quotation marks where hstore values were multi-line strings.
Merge branch 'patch-2' of github.com:jlxw/rails into patch-2