New rule: Use &&/|| for boolean expressions, and/or for control flow.
Skipping rather than dying when a parse error occurs.

This can happen in files that are called something.rb but are actually
meant to be preprocessed by erb.
Merge branch 'master' into more_rules
New rule: Never use "when x;". Use "when x then" instead.
Merge pull request #22 from jonas054/more_rules

More rules