Remove dead docs

It appears that these docs files were from previous builds, but no
longer match the current source.

This is what was left after deleting the docs/ directory, then re-running
grunt.
Tidy up gitignore

Groups ignores by the creating program
Adds Webstorm ignore
Removes duplicate entries
Merge pull request #44 from tpkelly/master

Remove dead docs
Removed global grunt-cli prerequisite.