empty classes with inheritance added
inheritance updated
standard section-templates added to each class
class Punkt completed; not yet tested!!!
test code for Punkt added
class gerade: method templates implemented
class Gerade added and tested
class Punkt modified: properties of p2 accessed via proper getters
abstract class Figur2D completed (not tested yet)
method signatures for Kreis and Rechteck added
class Rechteck completed and tested, test-code filled with templates
class Kreis completed and tested
info()-method moved to Figur2D-ABC; abstract toString()-method added to force extending classes to implement this!
Merge branch 'master' of https://github.com/TheStoepsel/prog.aufgabe2.geometrie

Conflicts:
	src/geometrie/Figur2D.java
	src/geometrie/Figur3D.java
	src/geometrie/Gerade.java
	src/geometrie/Kreis.java
	src/geometrie/Punkt.java
	src/geometrie/Quader.java
	src/geometrie/Rechteck.java
	src/geometrie/Zylinder.java