closes #28 Handle simple DBObject from Util
prepare for next release
[maven-release-plugin] prepare release fongo-1.4.4
[maven-release-plugin] prepare for next development iteration
closes #29 handle outputCollection
[maven-release-plugin] prepare release fongo-1.4.5
[maven-release-plugin] prepare for next development iteration
README.md: add build status

Display Travis build status on README.md.
Merge pull request #30 from adericbourg/patch-1

README.md: add build status
unncessary cast
start to handle driver 2.12.0
add new aggregate
closes #35