Use hardcoded platform/icon key

Since we're using an icon font for platform icons we need to
return the corresponding character for a given platform.
Merge pull request #286 from opscode/platform_icon_key

Use hardcoded platform/icon key
Add info to Manage Profile about updating account.

Let users know that they can update their email, password and name via their
Chef account. Add a link that goes to that page and let them know when it will
be updated on Supermarket.
Fix for Bash Install re: EOH
Merge pull request #291 from anthroprose/bash-install-fix

Fix for Bash Install re: EOH
Add link to InVision.
Merge pull request #293 from coderanger/patch-1

Add link to InVision.
Merge pull request #289 from opscode/manage_profile_information

Add info to Manage Profile about updating account.
Update Ruby dependencies.

This does not update Rails to 4.1 yet.