Updated README documentation
Lotus::Controller: .duplicate => .dup, .generate => .duplicate
[ci skip] Documentation for Lotus::Controller and Lotus::Action
Controller.duplicate can accept nil controllers namespace
[ci skip] Documented all the Lotus::Action modules
[ci skip] Documentation for Lotus::Controller modules
[ci skip] Yardoc adjustments
Bump lotus-utils dependency to 0.2.0
Bump version to v0.2.0
[ci skip] CHANGELOG