Allow linking of staff to Clients

Changes required for UI to link staff to client
Don't Allow other office user to Update the client

Restrict other office user to update group or client details
merging comment for linking staff to client
Merge pull request #371 from vishwasbabu/mifoscontributer-MIFOSX-434

Mifoscontributer mifosx 434
merging pull request for validating access to client/group resources
Merge pull request #372 from vishwasbabu/mifoscontributer-MIFOSX-429

Mifoscontributer mifosx 429
FIX naming pattern of database migration scripts as lowercase v causes migration not to be picked up, captial V is required.