TAJO-306: Implement ascii(string) function. (SeongHwa Ahn via jaehwa)
TAJO-375: TajoClient can't get result data when different os user. (hyoungjunkim via hyunsik)
TAJO-359: Implement lpad function. (Seungun Choe via jaehwa)
TAJO-361: Implement rpad function. (Seungun Choe via jaehwa)
TAJO-364: Implement mod/div function. (DaeMyung Kang via jaehwa)
TAJO-316: Improve GreedyHeuristicJoinOrderAlgorithm to deal with non-commutative joins. (hyunsik)
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into MANY_BUGS
Fixed typo.