Moved NavierStokes/ZigZag to NavierStokes/ZigZag-2D

Changed the name of the folder ZigZag to ZigZag-2D to fit with the
naming convention used in the rest of the project
Made Accordian Project

Split the accordian mesh file from the zigzag
directory, and created a new project to
compute it here.
Tweaked Zigzag to produce good results

Moved renolds number down to 100 because
1000 didn't seem to be giving reasonable
results and our default of 100 did.

Added a snippet of code to output the mesh
that we are computing on.
Created a project to try 3d navier stokes

This folder is dedicated to making a simple
step-35 3D example.

It doesn't work because of the code inside
step 35 that expects to be in 2d.
Python script to parse and visualize UCD files

Created a simple script that parses and
draws UCD files.  This may be useful for us
to check our work with.