Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Add optional convert parameter to Max, Min, Sum and Average operations
merge develop
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'master' of github.com:fanliao/go-plinq into develop
Merge branch 'develop' of github.com:fanliao/go-plinq into develop
fix an issue in performance testing code