matplotlib Code

make automatic masking and rescaling of variable data optional
in NetCDFFile.

use PyNIO to read data if the pure python NetCDF reader fails
(PyNIO can read GRIB1+2, HDF4, NetCDF4 and HDFEOS2).

fix bug in drawparallels introduced in last commit

use dashes kwarg

fix typos

fmt kwarg to drawparallels and drawmeridians can now be a
string formatting function.

remove linestyle kwarg from drawparallels and drawmeridians.

fix typo.

docstring modifications.

make close method a no-op for remote datasets.