TAJO-736: Add table management documentation. (hyunsik)
TAJO-717: Improve file splitting for large number of splits. (jinho)
TAJO-743: Change the default resource allocation policy of leaf tasks. (jinho)
Merge branch 'branch-0.8.0' of https://git-wip-us.apache.org/repos/asf/tajo

Conflicts:
	tajo-common/src/main/java/org/apache/tajo/conf/TajoConf.java