Release 0.5.2

Info:

• Documentation
• Docker Image: docker pull birdhouse/emu:0.5.2

Changes:

• updated pywps recipe 0.8.8.
• updated supervisor recipe 0.3.6.
• updated zc.buildout 2.7.1
• update Makefile.
• enabled bbox parameter.
• using Metadata role attribute.
• updated say_hello process.
• added multiple_outputs process.
• updated conda recipe 0.3.6.