Remove extra problems and fix some interpolation and error calculations

Merge pull request #53 from devmotion/new_ddeproblem

Fix new DDE problem with changed parameters

Small fixes to allow for Symplectic tests

Required for tests methods being developed in OrdinaryDiffEq.jl (part of GSoC too), so it's being released quickly.

Update REQUIRE to v0.6 and fix interp displays

Some interp displays throw errors in the latest version. And, now that v0.6- is no longer tested, it's dropped from REQUIRE

Add rng seeding

v1.13.0

seeded random problems and solutions

Weak noise in Monte tests and fixed noise display

v1.12.0

fix noiseproblem display

DiffEqOperator interface

v1.11.0

export the abstract type

Hotfix Monte Carlo printout

This is a very annoying bug with the latest display overloads because every time a MonteCarloProblem is made it would error in the terminal. This QoL patch stops that error and makes it display an informative summary instead.

Fix interpolations

Bug with test coverage only in different packages... should fix tests later.

Enhanced type displays

v1.10.0

problem displays

Last v0.5 release: Remove Parameters.jl

Parameters.jl wasn't being used anymore, so it's being removed. This is the last v0.5-compatible release.