[maven-release-plugin] prepare release katari-0.51
[maven-release-plugin] prepare for next development iteration
Ignoring invalid attributes fails in spanish.
[maven-release-plugin] prepare release katari-0.52
[maven-release-plugin] prepare for next development iteration
Use proper JsonRepresentation types in freemarker.

The JsonRepresentationWrapper considered all non-collection json objects
as string. This forced template authors to use <#if isEnabled == "true">
instead of <#if isEnabled>.

This is a breaking change.
Upgraded release notes for 0.53.
[maven-release-plugin] prepare release katari-0.53
[maven-release-plugin] prepare for next development iteration