Added a solution of the measles problem in the SIR lab using scikits.bvp_solver.
Commented out description of dopri5. Added an example solving a BVP using bvp_solver, and described how to separate the boundary conditions in the measles problem.
Merge branch 'develop' into bvp_solver

Merge work on SIR lab
Merge pull request #584 from joshualy/bvp_solver

BVP solver