Protobuf Jetbrains Plugin Versions Save

https://github.com/protostuff/protobuf-jetbrains-plugin/milestone/6

1. Add support for custom include path:
2. Add validation for message fields, enum constants and service rpc methods:
3. Add startup check for conflicting plugins:

#21: Fix NoClassDefFoundError in import resoolver.

• Add reference support.
• Add "Find Usages" support.

Fixes

• fixed highlighting of groups (#15)
• fixed formatting of trailing line comments (#16)
• fixed structure view bug - nested messages were not displayed (#17)

Enhancements

• add code formatting (#9, #10)

Enhancements

• add structure view (#7)
• add brace matching (#6)
• add commenter (#5)

Enhancements

• add support for new keywords: "stream" and "reserved" (#2)
• enable syntax highlight for embedded code blocks in Markdown editor (#1, #3)

First public release

• add syntax highlighting for proto2/proto3 and basic inspections