Retry add ivp solver

[davidrpugh]

@spencerlyon2 Hopefully we are all set!

[sglyon]

This looks great!! How did you get 54 of these commits in?

@jstac, once travis responds that all is well I think this should (finally 😄) be ready to merge.

[davidrpugh]

Not sure where all of that history came from...I checked out the most recent version of the three files from add-ivp-solver and along came some history (mostly related to files that are not being merged!).

[coveralls]

Coverage increased (+0.24%) when pulling 9041acb on davidrpugh:retry-add-ivp-solver into beca26e on jstac:master.

[davidrpugh]

@spencerlyon2 As far as I am concerned this is ready for a merge. I could always tinker with the examples notebook, but I have probably reached the point of diminishing returns. Does @jstac need to weigh in?

[sglyon]

@davidrpugh, yes I agree. This is ready to go.

We will wait for @jstac to take a look, but I imagine this will be merged soon.

[jstac]

@davidrpugh @spencerlyon2

[jstac]

Let's try that again

@davidrpugh @spencerlyon2

Thanks for the heroic effort. I hope you at least learned some useful stuff with all that wrestling with git.
I'll work through this at some stage today or tonight and if all is good I'll accept the PR.

[jstac]

@davidrpugh

This all looks great. The notebook is excellent. The exposition is very nice now. We'll feature it on the new QuantEcon site when it goes up in a week or two. I'll go ahead and merge. The following are suggestions for small improvements that you can implement post-merge or ignore as you see fit:

• You mention that an ODE is a functional equation and talk about "the" solution, and then go on and discuss the solution to the IVP. It might be worth pointing out the difference between the two --- the former problem has many solutions and the IVP picks out one.
• You might want to remove the derivative sign from (1.3) and put in an explicit difference --- especially since you describe it as a "difference equation".
• You are welcome to add university logos to the notebook (I think this came up earlier). This notebook is separate to the official documentation on readthedocs.