Update README.md

Clean up documentation for starting with project

README.md

@@ -6,10 +6,19 @@ CMock - Mock/stub generator for C
 Getting Started
 ================
 
+If you're using Ceedling, there is no need to install CMock. It will handle it for you.
+For everyone else, the simplest way is to grab it off github. You can also download it 
+as a zip if you prefer. The Github method looks something like this:
+
     > git clone --recursive https://github.com/throwtheswitch/cmock.git
     > cd cmock
     > bundle install # Ensures you have all RubyGems needed
-    > bundle exec rake # Run all CMock library tests
+
+If you plan to help with the development of CMock (or just want to verify that it can
+perform its self tests on your system) then you can enter the test directory and then
+ask it to test:
+
+    > rake # Run all CMock self tests
 
 API Documentation
 =================