Convert Poisson benchmarks to use pybench
Factor common Poisson parameters into shared module
Specify plot style for Poisson benchmarks
Don't reorder mesh in DOLFIN Poisson benchmark
Use same solver parameters in Poisson benchmarks
Add comparison of Firedrake/DOLFIN Poisson benchmarks
Specify parameters for profile graph
Add default for size of Poisson benchmarks
Use pybench main function in Poisson benchmarks
Use jacobi preconditioner for Poisson benchmarks
Poisson benchmarks: default action to running benchmarks

Only save result on rank 0 when running in parallel.
Update params for Poisson benchmark

Create a series of meshes that roughly double in number of DOFs.
Add cell and dof count as metadata for Poisson
Poisson benchmark: add series for number of processes
Script plots for Poisson benchmarks

Combine a series of a parallel run over several processors and plot
the sequential result over mesh size and parallel scaling for each
parameter combination.
Only plot the assembly and solve times
Factor advection-diffusion into pybench benchmark
Used CG + Jacobi in advection-diffusion benchmark
Saving is now only done on rank 0
Log L2 error norm for advection-diffusion