Add back default land bounds

[mandli]

In some instances the land bounds were not being set making the land plotting janky (technical term for awful).

[mandli]

Something is wrong with the colorbars that I need to fix (they are off center). Looking into it.

[mandli]

@rjleveque are you seeing this in any other examples? I am somewhat suspicious that this might be related to the pobj issue (clawpack/visclaw#219). Note that I am seeing this in both 2.7 and 3.x but for matplotlib version 2.0.x.

[mandli]

One thing to note here is that in this particular example I try to set the colorbar ticks manually. Not doing this does not fix the problem but makes it mildly better.

[rjleveque]

@mandli: Do you mean the fact that colorbar colors aren't centered about 0? But it looks like the ocean is white indicating no disturbance at some negative elevation. Maybe you have sea_level set to something other than 0 and the setplot is set to center around that value (I do this for some situations).

[mandli]

I think I figured out the problem. For the Ike example sea_level != 0.0 but in matplotlib version < 2 I translated the colorbar so that it looked like sea_level was the zero point but plotted as zero. It appears that the colorbar now always takes the vmin and vmax from the pobj rather than respecting clim. I am not sure if this is completely true but testing seems to indicate this to be the case.

So it's not probably related to clawpack/visclaw#219 but another fix for the plotting needs to be made. New commit forthcoming.

[mandli]

This is now working in Python2 but Python3 has the problem in clawpack/visclaw#219 as described. The fix there seems to work for Python2 and Python3.