TAJO-4: Update the project site (hyunsik)
TAJO-11: Update file README to reflect Apache incubation (hyunsik)
TAJO-10 Add derby.log to gitignore
Update CHANGES.txt for TAJO-10
fix for TAJO-12: Add information in README on how to subscribe to mailing lists
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo