reflect Sender API change to support mutliple categories
change list to set and add a convenient method using varargs
API changes was on the JSON payload as well
Minor refactoring
removed whitespace
[maven-release-plugin] prepare release 0.4.0
[maven-release-plugin] prepare for next development iteration
fix groupId and artifactId
Adding content-available builder + unit tests
Adding unit tests for untested builder methods
[maven-release-plugin] prepare release 0.5.0
[maven-release-plugin] prepare for next development iteration
next version is on maven central
Added proxy feature

Added the feature to setup Proxy configuration and send messages behind
a proxy environment.
removed local test changes
Revert "removed local test changes"

This reverts commit 181608e792a794bc75e20847ba5c5ff98a2ea324.
Revert local test changes

Revert local test changes
Doc / Test

Added Documentation & simple Builder Test
Javadoc

Added missing javadoc
Merge branch 'proxy'