add description of magnetic field project to GSoC 2017
add description of magnetic field project to GSoC 2017

OpenAstronomy/openastronomy.github.io,Cadair/openastronomy.github.io,dpshelio/openastronomy.github.io,Cadair/openastronomy.github.io,OpenAstronomy/openastronomy.github.io,Cadair/openastronomy.github.io,dpshelio/openastronomy.github.io,OpenAstronomy/openastronomy.github.io,dpshelio/openastronomy.github.io