DPM/Xrootd configuration fixes
Fix location of CREAM CE GIP + misc change to tomcat5 config
Fix permission problem
Add munge to CREAM CE
Enable glexec by default
Include WLCG repo only on SL6
Update README.md with list of validated services
Merge pull request #27 from jouvin/umd3-glexec

Umd3: various fixes, including enabling glexec by default