Merge branch 'efficient-clone' into 'master'

Efficient Clone

Since https://github.com/gitlabhq/grack/pull/1 this warning is no longer needed I think.

doc/install/requirements.md

@@ -55,7 +55,7 @@ it might require some work since GitLab uses several Gems that have native exten
 - 512MB is too little memory, GitLab will be very slow and you will need 250MB of swap
 - 768MB is the minimal memory size but we advise against this
-- 1GB supports up to 100 users if you do not have individual repo's over 250MB
+- 1GB supports up to 100 users
 - **2GB** is the **recommended** memory size and supports up to 1,000 users
 - 4GB supports up to 10,000 users