Add CommunicationEventContent Services

[hellozhangwei]

No description provided.

[danieltaylor-nz]

I checked this out and ran it locally without issue. Would you consider adding some Communication Event Content to the demo data here?

https://github.com/moqui/HiveMind/blob/master/data/HiveMindDemoData.xml

[danieltaylor-nz]

I merged this, but unfortunately, I failed to request this change to be made first. So I implemented it myself in the following PR:
#154

[hellozhangwei]

I checked this out and ran it locally without issue. Would you consider adding some Communication Event Content to the demo data here?

https://github.com/moqui/HiveMind/blob/master/data/HiveMindDemoData.xml

Yes, but I think it's better we have the uploading event communication content implemented for Add/Edit/Reply Comment on TaskSummary screen

[danieltaylor-nz]

Yes, I saw that too. There was no easy way for me to test your PR as there was no demo data with content, and no easy way to add content.

[hellozhangwei]

Please check PR moqui/HiveMind#35