Add deleted and clientVersion properties to FOAMGMailMessage in preparation for use with foam.core.dao.Sync.
Add deleted and clientVersion properties to FOAMGMailMessage in preparation for use with foam.core.dao.Sync.

jlhughes/foam,jacksonic/foam,jlhughes/foam,jacksonic/foam,foam-framework/foam,osric-the-knight/foam,mdittmer/foam,osric-the-knight/foam,foam-framework/foam,jacksonic/foam,jlhughes/foam,mdittmer/foam,jacksonic/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam,osric-the-knight/foam,mdittmer/foam,osric-the-knight/foam,foam-framework/foam,mdittmer/foam