add dummy class for tests
erkennt linien. Blob funktioniert noch nicht.
find upper and lower edge
find edges
add test project
add test
first test passing
add exception and tests
add more test images
Merge branch 'GuiSudokuFields'

Conflicts:
	res/layout/activity_main.xml
	res/values/strings.xml
	src/ch/zahw/students/sudokuhelper/MainActivity.java
rename sudoku_fields layout activity_main