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.
Adding a DIFFMAT method for Fourier.
Add a COLLOCFOUR class.
Add a PERIODIC/COLLOCFOUR preference in CHEBOPPREF.
Make possible [x w] = FOURPTS(N).
[x w] = FOURPTS exists, [x w v] = FOURPTS does not.
Merge remote-tracking branch 'origin/development' into feature-colloc-periodic
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.