Merge pull request #6 from liuliqiu/master

fix mongo_conv bug & add test
support persistant db connection
Merge branch 'master' of github.com:comger/kpages
Add persistant db connection unit test
unit test utilities
unit test update
Merge pull request #8 from bigeagle/master

support persistant db connection
bug fix
Merge branch 'master' of github.com:comger/kpages
Merge pull request #9 from bigeagle/master

Bug Fix
..
..
Merge pull request #2 from comger/master

update to head