Switched jslint to jshint. Broke everything.
Fixed jshint headers.
Stricter jshintrc.
Removed jslint headers from server/client/common modules.
Removed jslint headers from actions.
Removed jslint headers from system apps.
Enabled strict: true.
Enabled unused: true, ported aardvark jslint to jshint.
Linting: tutorial, changes.
Merge pull request #1002 from triAGENS/jshint

Switched jslint to jshint. Fixes #929