Adding new app for docs.
base model: News app from most current mojito src
Placed guides into a folder. Shelf now displays the titles of guides
displays offline MD files
displays offline MD files
Paginized large md files
guides are paginized
package.json fixes
Removing quickstart app because of issues merging Steven Lu's PR.
Merge branch 'docs_quickstart_app' of https://github.com/luchenghan/mojito into luchenghan-docs_quickstart_app