Issue #163 - Add email field and making inviteeId nullable
Merge pull request #200 from ndomar/Database-Models

Database_Add emain in Pending invitation and make inviteeId nullable
Add Deleted column
Merge pull request #204 from ndomar/Database-Models

Database_Add Deleted column
Adding old API
Merge pull request #205 from ndomar/API_FINALIZED

Adding old API
Merge branch 'develop' of https://github.com/ndomar/megasoft-14 into C4_nader_#41_messaging_system
Issue #167 - adding validations