This patch adds:

• a Dockerfile for building the zoo-kernel with some modules
• a docker-compose.yml file with zoo-kernel and postgresql
• a docker folder containing various configuration files

With the following zcfg content:

   <LiteralData>
    DataType = string
    <Default>
    </Default>	
   </LiteralData>

ZOO-Kernel wrongly output the following in the LiteralData or in the LiteralOutput node of the ProcessDescriptions document:

<UOMs><Supported/></UOMs>

• need to create a new Trac component named Documentation
• owner should be set to jmckenna