EvaServer 0.9.11 released

Already a new release, fixing a bug and picking up an important bugfix release in EvaProperties:

• Fix: AbstractResponse.htmlErrorPage has a fallback title in case the status code is null.
• Changed dependency to eva-properties to version 0.5.5 since it contains an important bugfix.
• The eva.config directory is now configurable through the plugin configuration. Defaults to "${basedir}/src/main/config".