Implemented circle. Dot is the core of line and circle.
	modified:   SimpleGeometry/src/main/java/uk/ks/jarvis/simple/geometry/fragments/BaseHolderFragment.java
	modified:   SimpleGeometry/src/main/java/uk/ks/jarvis/simple/geometry/fragments/CreateFigureDialog.java
	modified:   SimpleGeometry/src/main/java/uk/ks/jarvis/simple/geometry/fragments/ShapeDialog.java
	modified:   SimpleGeometry/src/main/java/uk/ks/jarvis/simple/geometry/holders/BaseHolder.java
	modified:   SimpleGeometry/src/main/java/uk/ks/jarvis/simple/geometry/shapes/Circle.java
	modified:   SimpleGeometry/src/main/java/uk/ks/jarvis/simple/geometry/shapes/Dot.java
	modified:   SimpleGeometry/src/main/java/uk/ks/jarvis/simple/geometry/shapes/Line.java
	modified:   SimpleGeometry/src/main/java/uk/ks/jarvis/simple/geometry/shapes/ShapeList.java