Create RC1 version
Update many dependency versions including Jackson
Add deprecation annotations where applicable due to underlying java driver deprecations

Add myself as a contributor
Merge pull request #56 from lukelukeluke/release21RC1

Release 2.1 RC1
Update changelog.md
set version to 2.1.0-SNAPSHOT so the release plugin works correctly
[maven-release-plugin] prepare release mongojack-2.1.0
[maven-release-plugin] prepare for next development iteration
reducing version after release problems
[maven-release-plugin] prepare release mongojack-2.1.0
[maven-release-plugin] prepare for next development iteration