dev-tools as non-root

hi there, as per subject, I made some changes to dev-tools to make it work successfully as non-root. I tested these changes on CentOS6 and F17, my pull request: https://github.com/aeolus-incubator/dev-tools/pull/7 it also includes some changes to README.md as it now provides a list of packages to be installed system-wide before launching the script. I thought launching as non-root was useful to both end users and devs cause it helps with the testing, isolation from the other system components, deploying of more versions in parallel and also provides some abstraction from the hosting distro. Feedback is very much appreciated. -- Giulio Fidente