Store supported platform legacy IDs on the platform join table
Update README to be concise, consistent & accurate

In an effort to create a more useable README, the following has been adjusted:

- use consistent markdown header syntax of #, ##, ###, ####, etc.
- make section headers semantically correct
- adjust language to be more consistent and readable
- wrap most content at 80 columns for readability and consistency
- move some content, like the roadmap, to the GitHub wiki
- update content to be accurate and up to date with the project
- remove the "to document" section
- add table of contents to the README

[skip ci]
Only import SCSS required for each file, remove settings.scss

To try and improve the performance of our styles compilation this
changes the application style sheets to only import the SCSS that is
required on a per file basis. This also removes the reliance on
settings.scss in favor of overriding foundation.css styles with
regular CSS overrides so we don't need to import as much.
Merge pull request #408 from opscode/supported-platform-legacy-id

Store supported platform legacy IDs on the platform join table
Merge pull request #406 from opscode/scss-imports

SCSS Imports
Merge pull request #403 from opscode/readme_update

Update README to be concise, consistent & accurate
Remove categories from cookbooks index

Since we're no longer exposing cookbook categories in the cookbooks
index UI there is no need to allow the cookbooks index to allow only
certain categories to be returned.
Merge pull request #411 from opscode/remove-categories-from-index

Remove categories from cookbooks index
adjusting language