Refactored JavaScript

Rearranged JavaScript code so that topsoil.js does more of the heavy
lifting and scatterplot.js reads more sensibly. Note that I’m no longer
inlining CSS! topsoil.js also now parses the data matrix entries for
σx, σy, and ρ. A few aliases are provided, so look and pick your
favorite.
Made build.gradle portable

Made build.gradle portable by defining run and debug manually. Now the
project is no longer tied to Netbeans.
Commiting before merging from upstream
Merge branch 'master' of https://github.com/CIRDLES/topsoil-prototype

Conflicts:
	src/main/resources/org/cirdles/topsoil/demo/scatterplot.js