Update make-examples
Implement black and white for matplotlib
Trim matplot figure
Page background sets plot background on matploblib

When only `--page-background` is set, the value of the plot background
will be the same.
Set transparent page when only plot color is chosen
Merge pull request #91 from abelsiqueira/make-examples-update

Update make-examples
Merge pull request #92 from abelsiqueira/mp-bw

Implement black and white for matplotlib
Merge pull request #93 from abelsiqueira/mp-trim

Trim matplot figure
Merge pull request #96 from abelsiqueira/plot-and-page-color

Page background sets plot background on matploblib
Merge pull request #97 from abelsiqueira/plot-color-transp-page

Set transparent page when only plot color is chosen