added nonuniform examples and fixed aux array bug in classic and shar…

[cr2940]

This is a new PR with a new example in advection_1d and modifications to solver file in classic and sharpclaw to make the example work. To plot the results, please refer to Fix 1D plotting mapc2p #250
PR in Visclaw (only the frametools.py, not all the pyc files).

[coveralls]

Coverage remained the same at ?% when pulling 343bc60 on cr2940:nonuniform into b375bcf on clawpack:master.

[cr2940]

I think Ranocha is also seeing similar problem in his PR with error in psystem_2d.psystem_2d verification step. But it occurs here only for Python 2

[ketch]

I think it's just a hiccup that happens sometimes on Travis. Usually, restarting the build fixes it.

[ketch]

Very nice; this looks good!

The WENO reconstruction in SharpClaw actually isn't written in a way that works correctly on nonuniform grids. So it's probably best to remove the option to use SharpClaw. After that, I think this can be merged.

[mandli]

If you go to your branch with these changes and merge in (or rebase) on the difference between this branch and the master branch here you will see if there are conflicts. You can then push up the new changes here if they pass on your machine.

[cr2940]

Got the merge of latest pyclaw into my branch to work. Now I will run some tests locally and push it, but I am afraid things like pyc or output files will also get pushed

[mandli]

Just make sure that you do not add files that do not need to be added, always do it purposefully with git add my_file rather than adding everything that is available. If you get those files you can always remove them by removing them from the staging area.

[ketch]

Even better: learn to use git add -p my_file

[cr2940]

Thank you both, I definitely made a quantum jump in understanding both pylaw and git through this