Merge pull request #110 from slayoo/master

TODO update
Merge pull request #111 from slayoo/master

strang -> trapez
small changes in resoultion of analytical fig
Merge pull request #112 from djarecka/master

small changes in resoultion of analytical fig
changing color of analitical solution
Merge pull request #113 from djarecka/master

changing color of analitical solution
code to plot a  2D droplet surface
changes in resolution of analytical solution
adding calling the plot2D_shallow_water_2d.py
Merge pull request #114 from djarecka/master

adding code to plot a 2Ddroplet surface
Merge pull request #115 from slayoo/master

renaming span to grid_size
changing pylab to  matplotlib.pyplot
changing pylab to  matplotlib.pyplot
moving basic plot settings to new file
moving analytical eq to new file
moving plot settings from plot2D
Merge pull request #116 from slayoo/master

moving opts out of the formulae namespcae
Merge pull request #117 from djarecka/master

moving analytical equations and plots settings to new files
Merge pull request #118 from slayoo/master

adding listing tags in test concurrent_1d
adding over_the_pole test with listings and adding listings to rotating_sphere test