Update docs

- Rename all "assemblers" strings to "assemble-contrib-rss"
- Reformat options
Update gruntfile.js

Update permalinks plugin name and add comments documenting assemble
tasks.
Update tests

- Create layouts directory
- Rename arctic file
Update variables
Minor changes to rss.js

Just cleaning up some stuff…

- Rename strings to assemble-contrib-rss
- Fix spacing
- Update failFeed function to be a bit more verbose
Rename LICENSE-MIT to LICENSE
Delete tests
Delete grunt
Update gitignore
Initial cleanup of man lib
Update package.json

- New author name
- New package name
Remove comment from helper.js
Add new docs content
Convert docs to use verb
Fixes some broken links
Fix merge conflicts