- Added a method to get the point of intersection. - Added getLength(). - Took out crazy null-tolerance in equals(). If your line is malformed,   you may get NPE's trying to test equality with another line. Fix your line.
- Added a method to get the point of intersection.
- Added getLength().
- Took out crazy null-tolerance in equals(). If your line is malformed,
  you may get NPE's trying to test equality with another line. Fix your line.

These are line segments anyway. We should maybe rename this
class to LineSegment.


git-svn-id: a1a4b28b82a3276cc491891159dd9963a0a72fae@4702 542714f4-19e9-0310-aa3c-eee0fc999fb1

threerings/narya,threerings/narya,threerings/narya,threerings/narya,threerings/narya