Enable characteristic-wise reconstruction and tolal fluctuation for Euler 1D.
Edit example files and add test for Woodwad-Colella blast problem.
Remove debug statements.
Edit/correct comments.
Fix declaration of variables in workspace.f90.
Fix import of sharpclaw1.
Pass num_ghost and num_eqn as arguments in the tvd2 reconstruction routines.
Make nosetests run from clawpack/pyclaw/examples instead from clawpack/pyclaw.
Merge pull request #410 from hadjimy/char_decomp

Characteristic decomposition for 1D Euler equations