Add support for rpc service code generation using templates

Fixed issue with multiple module outputs and PluginProtoCompiler
Add 'service_block' for service generator templates
Merge pull request #33 from kshchepanovskyi/fix/improve-tests

Upgrade JUnit to 4.11
Merge branch 'master' into feature/service-code-generation
https://github.com/protostuff/protostuff/issues/36 Remove protostuff-me
Merge pull request #37 from kshchepanovskyi/remove-protostuff-me

Remove protostuff-me
Fix imports
Imports in proto files should work for multi-module project

Maven plugin can search for imported proto files in the project's runtime classpath elements
Merge pull request #35 from kshchepanovskyi/feature/service-code-generation

Add support for rpc service code generation using templates
Merge pull request #38 from kshchepanovskyi/feature/proto-import-from-dependency

Imports in proto files should work for multi-module project
Merge branch 'master' into fix/dependency-management

Conflicts:
	pom.xml
	protostuff-maven-plugin/pom.xml
	protostuff-me/pom.xml
Fix build errors after merge with master (missing version for plexus in maven configuration)