Make build.js automatically remove unused variables from builds.
Make build allow `iife` with newlines and remove `isNode` from builds that don't need it.
Exclude Lo-Dash methods from `getVars` results and correct `varMap` check.
Correct `getVars` filter in build.js
Allow `findWhere` to be included as a lodash method in test-build.js.
Update builds with more dead code removed.
Track less variables and optimize dead variable removal in build.js.