some updates

Author: zingale

docs/source/intro.rst

@@ -5,10 +5,11 @@ Introduction to pyro
 
 pyro is a simple framework for implementing and playing with
 hydrodynamics solvers.  It is designed to provide a tutorial for
-students in computational astrophysics (and hydrodynamics in
-general). We introduce simple implementations of some popular methods
-used in the field, with the code written to be easily
-understandable. All simulations use a single grid (no domain decomposition).
+students in computational astrophysics (and hydrodynamics in general)
+and for easily prototyping new methods.  We introduce simple
+implementations of some popular methods used in the field, with the
+code written to be easily understandable. All simulations use a single
+grid (no domain decomposition).
 
 .. note::
 
@@ -24,6 +25,8 @@ equations. In particular, the following solvers are developed:
 
 * compressible hydrodynamics
 
+* shallow water hydrodynamics
+
 * multigrid
 
 * implicit thermal diffusion
@@ -36,11 +39,3 @@ equations. In particular, the following solvers are developed:
 
 Runtime visualization shows the evolution as the equations are solved.
 
-In the pages that follow, the following format is adopted:
-
-* PDF notes provide the basic theory behind the methods.  References
-  are cited to provide more detail.
-
-* An overview of the use of the applicable modules from pyro provided.
-
-* Exercises interspersed fill in some of the detail.