TODO

new chapters:
  
  -- MHD

  -- relativisitc

  -- radiation hydro

  -- higher-order

  -- AMR



sample of public codes

  -- Athena
  -- Castro
  -- Enzo
  -- Flash
  -- Maestro
  -- Pluto
  -- Zeus


=======================

Chapter 2:

 -- add BC and difference on a grid examples perhaps through a ipython
    notebook.



=======================

Chapter 3:

 -- add a notebook showing FTCS and upwind on a simple FV grid
 
 pyro exercises:

 -- try out different limiters


=======================

Chapter 4:

 -- draw a figure showing the intersecting characteristics and the 
    condition for a shock

 -- exercise: notebook showing burgers' solution


=======================

Chapter 5:

 -- add a figure for section 5.2.1, showing piecewise constant
    reconstruction

 -- add a discussion (interlude) motivating how limiters are derived

 -- bulletted list on different Riemann solvers

 -- derive the jump conditions and the entropy conditions for the 
    Riemann problem and show the function we zero.

 examples:

   -- 1-d Riemann solver
   -- 1-d Godunov

 pyro...


=======================

Chapter 6:

 examples:

   -- 1-d relaxation
   -- 1-d MG


=======================

Chapter 7:

  -- show the output from diffusion
  -- show the problems with C-N discretization (from 688 notes)

  examples:
    
    -- 1-d diffusion solver
    
  pyro