Merge pull request #109 from djarecka/master

spreading_drop_2d with plotting code in python; small changes in spreadng_drop_1d
a TODO item
Merge branch 'master' of github.com:slayoo/libmpdataxx
TODO update
Merge pull request #110 from slayoo/master

TODO update
strang -> trapez
Merge pull request #111 from slayoo/master

strang -> trapez
Merge pull request #112 from djarecka/master

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

changing color of analitical solution
Merge pull request #114 from djarecka/master

adding code to plot a 2Ddroplet surface
renaming span to grid_size
fixing dashed-line problem in gnuplot output
renaming n_eqs -> n_eqns
Merge pull request #115 from slayoo/master

renaming span to grid_size