Replaced delegator methods with Forwardable def_delegator in Topic
Rake Commands can be chained

We can run all three setup related commands in one go, making it easier for people to copy-paste. Also it would be bit faster, I would imagine.
Move `insideGroup` into the helper, not the class for grouped each
FIX: Don't do intraword italics when prefixed by a forward slash
Merge pull request #1405 from gaurish/patch-1

Rake Commands can be chained
Merge pull request #1403 from einarj/use_topic_delegators

Replaced delegator methods with Forwardable def_delegator in Topic