Added database, changed SharedClasses to match database requirements. Added some database features.
Minor fixes
Added contructor to Sample class
Added method for "nice" way of getting set of rows
Added geter for parameters
Added method for getting measurement's samples
Removed unused class.
Added Interfaces for DAOs
Added beginning and end marks for measurement
Added constructors for injecting IDs to Experiment and Measurement
Added support for getting and updating entities in db.
Merge branch 'pers'