IDMEF v2 - Protobuf3

Quick & dirty implementation of IDMEFv2 with protobuf

Prerequisities

Protobuf 3: https://github.com/protocolbuffers/protobuf
proto-gen-doc: https://github.com/pseudomuto/protoc-gen-doc

References

https://github.com/SECEF/idmefv2-definition

Changes with original definition

Enumerations are prefixed (mandatory in protobuf)
TODO: Verifications
TODO: Tests