Started work on spectral methods.
Added design file
more spectral prototyping
Partial implementation of spectral
Merge remote-tracking branch 'origin/spectral' into spectral
minor commit
Working spectral solver
Added initial image method
Progress on image
Added solution extraction routine, modified image
Working animation function
Removed junk files
Modified FKPP example to have a more interesting diffusion coeff
Expanded ermentrout example
Updated examples