build netcdf from source

[delgadom]

Workflow

• [x] Closes issue ClimateImpactLab/bolliger32-clawpack-image#8 and #53
• [x] Notebook:worker pairing builds & passes local build, visual inspection & client.map tests
• [x] Passes travis tests
• [x] Image deployed on dev branch (see notebook and worker dev tags)
• [x] Worker passes manual deployment test on compute.rhg
• [x] Notebook+worker passes test-hub deployment
• [x] Updates integrated into downstream images

Summary

pulls from custom versions of jupyter/base-notebook and continuumio/miniconda3 with netcdf-fortran compiled using gfortran and gcc. intent here is to speed up downstream geoclaw build process by caching this lengthy step.

[delgadom]

Considering moving this to a separate image: https://github.com/ClimateImpactLab/gfortran-netcdf-notebook/