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.
Use a lambda function for each test.

References:

https://github.com/clawpack/pyclaw/issues/412
https://groups.google.com/forum/#!msg/nose-users/nqlC1-yRFpg/HE_qG8ATXDoJ
Merge pull request #414 from clawpack/ahmadia/fix_nose_collect

Use a lambda function for each test.
Merge pull request #410 from hadjimy/char_decomp

Characteristic decomposition for 1D Euler equations
changed line 172 in util.py to verifier,following the argument input of function gen_varians
Merge pull request #415 from sanromd/fix_util_l172

changed argument of test_app in line 172 in util.py to verifier
Clean up comments and code in some examples.
Fix computation of cell centers with ghosts.
More cleanup of annulus advection example.
More cleanup of examples.
Remove duplicate shock bubble file.
Move import of scipy (for now) so Travis won't fail.

Also update name of shallow water 1D example file.
Use dummy values for transverse solvers if they won't be called.  Fixes #419.