fix(build): switch to cjs output for es5.

System output does not work at the current versions of TS and
system.js. Will revisit after upgrading TS.

Removes unused traceur tooling.

Closes #3974

docs/typescript-package/index.js

@@ -1,5 +1,3 @@
-require('../../tools/transpiler/index.js').init();
-
 var basePackage = require('dgeni-packages/base');
 var Package = require('dgeni').Package;
 var path = require('canonical-path');