Use of aerogear-parent and BOM version 0.2.0
Extraction of bom version into property
Adding 'aerogear-sender' header to the java lib
Removing RestEasy dependency and adding jackson.

As far as I can tell there are now dependencies to RestEasy in the code
base. The dependency to RestEasy was of scope provided which meant that
a project depending on this one would have to define the dependency to
jackson them selves.

Adding jackson as a compile dependency allows project using this one to
not have to add any dependencies.
Switching to com.fasterxml.jackson.
Refactoring of SenderClient and JavaSender.
Merge branch 'dbevenius_work'
adding travis status icon
Updating dependency version desc.
[maven-release-plugin] prepare release 0.7.0
[maven-release-plugin] prepare for next development iteration
Remove redundant version declaration