Added ipython notebook which solves the heat equation explicitly
Added ipython notebook which solves the heat equation explicitly

atgeirr/equelle,sintefmath/equelle,sintefmath/equelle,sintefmath/equelle,sintefmath/equelle,atgeirr/equelle,babrodtk/equelle,babrodtk/equelle,atgeirr/equelle,babrodtk/equelle,sintefmath/equelle,atgeirr/equelle,sintefmath/equelle,sintefmath/equelle,atgeirr/equelle,atgeirr/equelle,babrodtk/equelle,babrodtk/equelle,atgeirr/equelle,babrodtk/equelle,babrodtk/equelle,sintefmath/equelle,atgeirr/equelle