Added RenwableTargetInvestorclass
Changed implementation of power plant capacity (now a direct property
of the power plant, instead of only being a property of
PowerGenerationTechnology).
Continued working on renewable Target investment
Updated face script (figures).
Included the TargetInvestor's actions in the private investor's
market forecast.
Refactoring of class names.
Worked on queries.properties and xml-file.
Worked on renewable target investor. Fixed fuel mix error.
Fixed regression error, enabled fuel switching within CO2-electricity market iterations.
Merge branch 'feature/resInvestor' into develop