flake8
base gmtpy-epstopdf on newer version of epstopdf
fix first two examples
removed a debugging statement
gmtpy: pycdf -> scipy.io.netcdf

Signed-off-by: Sebastian Heimann <sebastian.heimann@gfz-potsdam.de>
gmtpy: fixed a bug in layout calculations

Signed-off-by: Sebastian Heimann <sebastian.heimann@gfz-potsdam.de>