- The "observations" operation simply counts the number of total queried
elements over the inputs of each unit

- If getImportances is set to true, the regressor will print a sorted
list of features and their importances, after performing training
- A REST action to retrieve the same list has been added

- Test plugin that can be used to evaluate the performance and functionality
of the query engine and unit system

- Also fixed a few compilation warnings

- Now supports also standard deviation and percentile computation
- Multiple output sensors per analyzer can be defined, each performing
a different aggregation task
- QueryEngine has been slightly modified so as not to clear the input
sensor reading buffer (if any), thus allowing to accumulate sensor
values with subsequent calls

- Template for Job Analyzers, derived from AnalyzerInterface

- Update config files to reflect new topic structure
- Updated READMEs accordingly
- Added support for "relaxed" analyzers, whose units can be built
even if some sensors cannot be found in the system
- Added support for sub-units, so as to build hierarchical unit structures

- The GlobalConfiguration class includes all shared logic to read and
parse configuration attributes for the collectagent and dcdbpusher
- The class is further expanded to add application-specific
configuration parameters and blocks

- Integration of data analytics framework in collectagent complete
- REST API integration still pending
- Added some documentation to the code

- A nicer and refactored version of the "average" plugin
- Allows to perform arbitrary aggregation operations over sensors, like
sum, average, or maximum

- Added a 'common' directory where all shared code has been placed
- Analytics package has been moved out of dcdbpusher, now has its own makefile
- Some renaming here and there for uniformity