First attempt at parsing expressions trees to first order form!
Introducing the TREEVAR class, using ADCHEBFUN is unneccessary.
Further progress on converting to first order systems.
More improvements for first order reformulation.
Various improvements.
Almost working for Lorenz! Still need to work on variable counting.
Bug fixes.
Merge branch 'development' of ssh://github.com/chebfun/chebfun into feature-firstOrder-reform
Getting rid of unneccessary treeChebfun class.
Adding missing files.
Merge branch 'development' of ssh://github.com/chebfun/chebfun into feature-firstOrder-reform
*Printing number of variables and different colours in plotTree.

* Including the t argument in toAnon.

* Passing domain information to treeVar/toFirstOrder.
Adding some tests for the treeVar class.

These will have to be updated to usual Chebfun standards before
merging to development.
Ensuring correct things get done for non-autonomous IVPs.
Starting to generalize \ for IVPs.
Merging toRHS methods for systems and scalar problems.
Enabling final value problems.
Adding demos
Improvements to chebop/solveivp.
Adding treeVar demos