Bug fixes

Server

f888679 Notify plugins on subscription change, #757
7a6842c Expose ServerAPIVersion as a separate config option
46f19c8 Adding validation of mongodb options
08bd568 Allow URI option for mongodb, thanks @saitensou
f509a96 Yet another fix for #738
0631fba Consistenly use plain UID in communication with the plugin (#753)

iOS, Android, Webapp, JS-SDK

No changes.