DATACOUCH-27: Mapping @Id field with MappingCouchbaseConverter

Fixed @Id field rewriting from CouchbaseDocument into domain object.
More info can be found at DATACOUCH-27 JIRA issue.
Merge branch 'master' into DATACOUCH-27

Conflicts:
	.gitignore
DATACOUCH-27 - Code review suggestions.
Merge pull request #5 from mzasada/DATACOUCH-27

DATACOUCH-27: Mapping @Id field with MappingCouchbaseConverter