Merge pull request #10 from renej-github/master

tests added in FongoTest
change version
[maven-release-plugin] prepare release fongo-1.3.6
[maven-release-plugin] prepare for next development iteration
add FongoRule into src/main and permit to create unique index with unique:1
add FongoRule
[maven-release-plugin] prepare release fongo-1.3.7
[maven-release-plugin] prepare for next development iteration
Added fix in FongoDBCollection and test in FongoTest for find if only _id is excluded