DataSyncPrep#29_yuanzhe:modify database structure and documents
Merge pull request #32 from huyuanzhe/DataSyncPrep#29_yuanzhe

DataSyncPrep#29_yuanzhe->wangfeng
OK
DataSyncPrep#29_yuanzhe:add dao for action history
Merge pull request #35 from huyuanzhe/DataSyncPrep#29_yuanzhe

DataSyncPrep#29_yuanzhe->wangfeng
ok
add get mac lib
Merge pull request #36 from rtty122333/DataSyncPrep#29_wangbo

DataSyncPrep#29_wangbo->shuanzi 
add a get mac lib
DataSyncPrep#29_wangbo->yuanzhe: set unique id functions
DataSyncPrep#29_wangbo->yuanzhe
DataSyncPrep#29_yuanzhe:keep a record of action history(insert delete and update)
DataSyncPrep_yuanzhe:use Method getFileUid to generate uri
Merge pull request #37 from rtty122333/DataSyncPrep#29_wangbo

advise：auto generate sysUid
Merge pull request #38 from huyuanzhe/DataSyncPrep#29_yuanzhe

DataSyncPrep#29_yuanzhe->wangfeng
OK
Merge remote-tracking branch 'upstream/DataSyncPrep#29'

Conflicts:
	nodewebkit/backend/db/rio