Enable jscs for `lib`, fix style violations
Coding style cleanup (Gruntfile, lib)

 - Gruntfile: add `jshint` and `jscs` as deps of `grunt test`
 - Gruntfile: temporarily disable checks of `test` scripts
 - .jscsrc: relax jsdoc validation
 - .jshintrc: relax the rule for property access via dot notation
 - lib: fix remaining style issues