Added grunt-mdlint to CI tests
Fixed typos in comments
Updated badge urls
Fixed dependency badge link
Bumped jade minor version
Added clean task to test task alias
removing stop words from URL strings

Additionally, coded for a few caveats in the regular expression replacements

Goals:
- more user friendly
- improve SEO

Changes:
- huned/node-stopwords
- formatPostUrl() regex and stopwords filter()
Merging latest upstream changes from CabinJS/grunt-pages