PointTest tdd and absolute method.
PointTest tdd and negate method.
PointTest tdd and multiply method and change pointObj to point.
PointTest tdd and multiply method and add case for negative value
PointTest tdd and divideBy method
PointTest tdd and median method
PointTest tdd and offset method
PointTest tdd and advance method
PointTest tdd and equals method
PointTest tdd and hashCode method
PointTest tdd and toString method
add test code for negative value for absolute method.
Merge pull request #23 from millpoo/master

add test code for negative value for absolute method.