new parameter interface implementation (better structure), check and default value functor support for input parameter interface
removed obsolete files
adapted interfaces: added type, description, default and check
added stream operators for dynamic point
fixed operator== and operator!= for interfaces
Merge branch 'FlorianRudolf/feature-parameter-interface-improvement' into FlorianRudolf/feature-netgen-make-mesh

Conflicts:
	include/viennamesh/core/algorithm.hpp
cell_size is an optional parameter now, valid query required