Direction graph computation.
Merge branch 'master' of https://github.com/MrLoNee/SketchFX

Conflicts:
	src/main/java/com/ncl/sketch/agent/di/DomainIndependentAgent.java
minimumCorrelation set to 95% for circle recognizer.
Merge branch 'master' of https://github.com/MrLoNee/SketchFX

Conflicts:
	src/main/java/com/ncl/sketch/agent/di/DomainIndependentAgent.java
	src/test/java/com/ncl/sketch/agent/di/CirclePatternRecognizerTest.java
	src/test/java/com/ncl/sketch/agent/di/StrokesTest.java
Merge with previous code.