Fix #3

Updates to implement finish, process MultiSmartData for v1.2 (Mobile) SmartData and MultiValue workflow support.

If Series was updated by an attach, changing t0 or t1, it was not found with original parameters.  

Folder searcher renamed to filter. Search files nomeclature standard changed to f<id>, to recall filters and to follow the same nomeclature standard from workflows.
Options parameter renamed to 'filter'. The filter parameter contain an id field to specify which filter should be executed (default is 0). The field 'parameter' should be used to denote parameters specific to each filter, and will be parsed by filter itself.

Moreover, fixing SmartAPI search method to call the correct backend function.

A search API has been created.
The Backend and the SmartAPI has been modified to support the search functionalities.
A search recieves a series as a parameter, one that do not necessarily specifies a unit. Similar to a workflow, a search type is defined per domain. Moreover, a 'options' parameter is also expected, specifying which type of search will be performed. If options is not presented, search of index 0 will be executed.
A search returns a multi-unit series, ordered by timestamp.

An example for tutorial domain is provided, where through search0 anomalous temperature values are detected in the space-time range specified by the series parameter.