Added Fitter interface.
Added operator== and operator!= to Point.
Added include guards in point.h.
Added output streaming operator for Point.
Added input streaming operator for Point.
Added ParserError class.

Not implemented nor tested.
Added Parser2d class.

For parsing 2d points from input stream.
Ignore bin directory.
Changed Point output streaming operator.
Implemented ParserError class.
Fixed Parser2d parsing algorithm.
Read points from stdin.