Code formatting
Update gemfile source
Always run :before and :after blocks

These blocks are supposed to run before and after page script, if you
don't explicit register a noop function for a page these blocks never
run. Since they are global blocks, it should run even if page is
initialization is not defined.
Update readme
Merge pull request #1 from lucasmazza/always-run-before-after

Always run :before and :after blocks