Removing junk files: old code files, python cache files, log folders.

A whole response json can be too large to be handled as an argument to a workflow call. Thus we decided to inform the parameters with a buffer file to be read by the workflow.
Also, as previously discussed, the series workflow is not used as a filter during data querying. It is used to process the data before responding to the client.

Backend now controls workflow daemon execution;
Workflows are placed directly on /smartdata/bin/;
Workflow names are inN and outN for input and output workflows, respectively;
S-curve workflow (in3) added to aqtech domain;
Workflows are able to make notifications via the returned JSON.