Broken links in _episodes_rmd/03-crs.Rmd

[Astahlke]

Under Which projection should I use of Episode 3: Coordinate Reference Systems Line 113 references a two broken links:

• University of Colorado's Map Projections
• Department of Geo-Information Processing

I'm guessing these should be:

• https://foote.geography.uconn.edu/gcraft/notes/mapproj/mapproj_f.html and
• https://kartoweb.itc.nl/geometrics/Map%20projections/mappro.html

Thanks for this lesson!

[jsta]

Thanks! I created a Pull Request at #58 with a fix to this.