json-cycle missing in built in libraries

[yoosiba]

N4JS runtime depends on json-cycle that is not provided with the ide. No projects can be executed (Launched in Node.js) or tested (Test in Node.js) until json-cycle is added to the dependencies and installed via Library Manager.

To reproduce:

1. ensure you have no json-cycle installed (check with library manage, uninstall if necessary)
2. Use context menu to run or test N4JS file, see errors

   (SystemJS) Cannot find module 'json-cycle/cycle'
   Error: Cannot find module 'json-cycle/cycle'
       at Function.Module._resolveFilename (module.js:470:15)
       at Function.Module._load (module.js:418:25)
       at Module.require (module.js:498:17)
       at SystemJSNodeLoader.require [as _nodeRequire] (internal/module.js:20:19)
       at C:\Users\me\N4JSIDE\plugins\eu.numberfour.n4js.external.libraries_0.0.1.201704061613\runtime\n4js-es5\src-gen\es\n4js-es5\rt\post-systemjs.js:158:53
       at SystemJSNodeLoader.__sys.normalize (C:\Users\me\N4JSIDE\plugins\eu.numberfour.n4js.external.libraries_0.0.1.201704061613\runtime\n4js-es5\src-gen\es\n4js-es5\rt\post-systemjs.js:154:16)
   Error loading eu.numberfour.mangelhaft.assert/n4/mangel/assert/Assert as "eu.numberfour.mangelhaft.assert/n4/mangel/assert/Assert" from prj/mod

[JensN4]

In the new mangelhaft version, we do not need jscon-cycle anymore. So I close this bug as obsolete.