Merge pull request UESTC-ACM#210 from UESTC-ACM/master

Release v2.2.2

Merge pull request UESTC-ACM#191 from UESTC-ACM/master

Release v2.2.1

Merge pull request UESTC-ACM#169 from UESTC-ACM/master

Release v2.2.0

Merge pull request UESTC-ACM#105 from UESTC-ACM/master

Release v2.1.1

Merge pull request UESTC-ACM#82 from UESTC-ACM/master

Release: v2.1.0

Merge pull request UESTC-ACM#31 from UESTC-ACM/master

release: v20140220-1100

Merge pull request UESTC-ACM#27 from UESTC-ACM/master

release: v20140219-1200
release issue: UESTC-ACM#26

Release candidate: 20140213-2149-RC1.