GSoC 10th week review

During this week, I continued to improve BoundaryValueDiffEq.jl and help fix OrdinaryDiffEq.jl and relating docs. Here is a summary:

1. Completed the documentation for all of the avaiable methods in OrdinaryDiffEq.jl
2. Add MIRK3 method
3. Fix documentations for BoundaryValueDiffEq.jl
4. [Finish all stage_limiter! and step_limiter! in explicit RK methods]

Next week, I will follow Avik’s work on improving the performance and reducing precompile time of BoundaryValueDiffEq.jl, make BoundaryValueDiffEq.jl more powerful.