EPyGrAM

Commit commit:660134f5

Contents, since 1.3.2:

• domain_making update: I and E zones in pgd
• hybridP_coord_to_3D_altitude_field()
• vgrid site package; provide handy tools to generate vertical hybrid-pressure coordinates (A & B)

• in place method modify_validity()

• even better handling of the gribapi indexes bug (the former still led to "Too many open files error")

• installation script: install_epygram.py

• numerous various fixes...
• doc: dependancies, colormaps, cheatsheet.pdf, epy_doc.py