Separate serialiazation and json response from view processing.
Improve urls formatting.
Apply PEP8 formatting.
Remove extra space for method call.
Improve response documentation.
Minor improvements in order_name and serialize methods.
Minor aesthetics changes.
Revert "Improve urls formatting."

This reverts commit cf8c3f139c04295939032e85eae37ade46ca4611.
Merge pull request #39 from ET-CS/master

João Paulo changes