tree c226c93033131ebd1435c91129dc27b88003a2a3
parent 83f051361bcc39d527816dc0e9c73d27df06aaf8
author Hao Zhu <haozhu233@gmail.com> 1526310966 -0400
committer Hao Zhu <haozhu233@gmail.com> 1526310966 -0400

simplied some logics;
Added position offset to row_spec;
Adding @leovan to author list