Style fixes.

Errors were detected using coffeelint.
More idiomatic CoffeeScript for Utils.isUrl
Tests for Utils.isUrl
More idiomatic CoffeeScript
Wrap lines at 110 chars
Tidy up if-statement
Align regex comments on the same line as the expression
Lay out long TLDs on one line
Move instant tests to the top of the function: return early if possible
Remove unused Class
Merge remote-tracking branch 'liesen/idiomatic-coffee-utils' into next-release
Touching up.
Merge branch 'next-release'
Fix upgrade message. Closes #644.
Merge branch '1.39'
Clean up Cakefile.
Add JSCoverage support.
Tweak README.
Add more tests, and remove old settings code.
More lint fixes.