Coding Sprint Project: Solving Conics

* People: Marco Streng, Mak Trifkovic, Peter Bruin, John Cremona

* This is Trac ticket 727: http://trac.sagemath.org/sage_trac/ticket/727

* Write for Sage a Conic class using Denis Simon's pari code, possibly mwrank, finding points over number fields, other fields?