Replace dependency proj4js-defs

[na9da]

The /proj4def endpoints uses this dependency which has an unstated license.

Alternatives:

• proj4js-defs itself is the output of a script. We could replace the dependency with the output instead.
• Also from Kevin:

  Betcha you could replace it within a one liner against a PostGIS database we have lying around

[zoran995]

Created last night a https://github.com/zoran995/proj4-cli
small CLI connects to the PostGIS database and generates the espg.js file the same as in node-proj4js-defs. There is also a generated version of file in it

[pjonsson]

@na9da I think yuletide/node-proj4js-defs#2 solves this issue.