Merge pull request #7 from aliceh/master

Added Tagging tests.
Update the selenium standalone jar version for the Ubuntu installer
Provided a separate installer for Centos 6
Removed the installer that was changed to ubuntu installer
Adjusted Centos installer
adjust sudo write call in the centos installer
adjusted selenium server output directory to /tmp
Merge pull request #9 from aliceh/master

Fixed isuues for upstream merge.
Removed the incomplete files that came from Alice's dev branch
reworked dir structure and added runner script to handle env concerns
Update README.md
Update README.md
Update installer_se34euca_centos.py
Update installer_se34euca_ubuntu.py
Update README.md
Update README.md
Update README.md
Update README.md

Added link to wiki page for Guidelines for Contributing Testcases
Update README.md

Added better description for wiki link.
Update README.md