Update README
Enable access to action name from within the action block
Fix "more details" link in Actions block
Merge pull request #57 from randaalex/master

Fix "more details" link in Actions block
Document JS test helpers a bit
Refactor common code for component and actions DSL

Extracted to Core::DslSupport. It should be possible to reuse it for declaring columns in Basepack, too.
Slightly refactor Core::Javascript