no notebook associated with netCDF intro
add data files for netCDF_intro exercises
Merge remote-tracking branch 'upstream/master' before adding
netcdf_intro files.
removing ncss/pandas for now. will revive later
added presentations files for netcdf_intro
add data files for netCDF_intro exercises
added presentations files for netcdf_intro
renaming NCSS slot
tweak netcdf_intro presentation
Merge branch 'master' of https://github.com/russrew/unidata-python-workshop

Conflicts:
	presentations/netcdf-intro.pdf
	presentations/netcdf-intro.pptx
Merge branch 'master' of https://github.com/Unidata/unidata-python-workshop
Renamed IPython Notebook examples directory.
Tweaking example notebooks, added an example for sharing IPython notebooks.
Added near-final version of IPython Notebook slides.
Reordered notebooks.
Adding additional information.
Updated link in README.org to ipython notebook examples.