Refactor frametools.plotframe to not read from disk.

Allow plotting from memory by introducing a lower level
function plot_frame that doesn't try to read from disk.
Merge pull request #90 from ketch/plot_from_memory

Add frametools.plot_frame that plots but does not read from disk.
Add option plotdata.plotaxes = image for scaled, tight axes.
Merge pull request #91 from ketch/axis_image

Add option plotdata.plotaxes.image for scaled, tight axes.
Add `plotstyle` to amr attributes for 1d from 2d plots
Merge pull request #94 from mandli/add-amr-plotstyle

Add `plotstyle` to amr attributes for 1d from 2d plots
updated JSAnimation/IPython_display.py so that speed of animation can be controlled in IPython notebook apps
Merge pull request #95 from rjleveque/JSAnimation_display_update

updated JSAnimation/IPython_display.py
Add JSAnimation to setup.py
Merge pull request #97 from clawpack/visclaw_setup_jsanimation

Add JSAnimation to setup.py
set Agg backend in plotclaw.py for some systems where it complains about DISPLAY not being set.
set current_data.level properly in frametools
Provide option to not show buttons in JSAnimations (slider only).
Merge pull request #99 from ketch/omit_buttons

Provide option to not show buttons in JSAnimations (slider only).
Better handle the case where gauges are specified in setrun.py and show up in gauges.data but are not in fort.gauge, perhaps because gauge location is outside domain or initial time of gauge recording was not reached.
Merge branch 'missing_gauges' into levels_gauges

* missing_gauges:
  Better handle the case where gauges are specified in setrun.py and show up in gauges.data but are not in fort.gauge, perhaps because gauge location is outside domain or initial time of gauge recording was not reached.
  set current_data.level properly in frametools
Merge branch 'plotclaw_Agg' into levels_gauges

* plotclaw_Agg:
  set Agg backend in plotclaw.py for some systems where it complains about DISPLAY not being set.
Merge pull request #103 from rjleveque/plotclaw_Agg

set Agg backend in plotclaw.py
improved warnings printed if gauges.data not found
Merge branch 'master' into levels_gauges
Update to include a merge already incorporated in this branch.

* master: