update readme

Author: bolandrm

README.md

@@ -24,6 +24,13 @@ This should essentially be a drop in alternative to [sass-rails](https://github.
 
 __Note:  This is a new project, please report any issues you come across!__
 
+
+## Libsass Compatibility With Ruby Sass
+
+For a look at the compatibility between Ruby Sass and Libsass, check this
+[compatibility chart](http://sass-compatibility.github.io/) out.
+
+
 ## Installation
 
 Add this line to your application's Gemfile:
@@ -37,6 +44,23 @@ And then execute:
     $ bundle
 
 
+## Deployment to Heroku
+
+Due to Libsass compilation requirements, you upgrade to the
+[Heroku Cedar-14 Stack](https://devcenter.heroku.com/articles/cedar-14-migration)
+in order to successfully install this gem.
+
+Upgrading to Cedar-14 is usually a painless process.
+
+
+## Installing alongside a gem that depends on Sass-Rails
+
+Libraries explicitly depending on Sass-Rails, such as ActiveAdmin, can cause
+conflicts with installation of SassC-Rails.  While we have no built-in solution
+for this, please check out [this issue](https://github.com/bolandrm/sassc-rails/issues/6)
+for a workaround.
+
+
 ## Contributing
 
 1. Fork it ( https://github.com/[my-github-username]/sassc-rails/fork )
@@ -46,6 +70,7 @@ And then execute:
 1. Push to the branch (`git push origin my-new-feature`)
 1. Create a new Pull Request
 
+
 ## Credits
 
 This gem is based on [sass-rails](https://github.com/rails/sass-rails), and