* minor comments added.
* add a new argument aPartitionFullProcess to iKeyAlias
+ constant IDB_ERR_KEY_NOT_EXISTS = -102
* modify the idbErrorStr function for the new IDB_ERR_KEY_NOT_EXISTS
* constant.
+ function iKeyPathDelete(sds aDir)
+ function iKeyPathIsExists(sds aDir)
* [bug] iKeyAlias,iAttrCountInFile,iAttrsInFile supports partition key
* now.
+ lodash package
+ constant IDB_ERR_KEY_NOT_EXISTS
+ deleteInFileSync, deleteInFile
+ createKeyAliasSync
+ getAttrCountInFileSync
+ getAttrsInFileSync
* test added for these functions