Version 0.15.0

• [FIX] Make ursa an optional dependency since it's currently nearly impossible to install soap on a windows machine otherwise (#832)
• [FIX] Fixed issue of referencing element in another namespace (#831)
• [FIX] Fixed incorrect WSDL in CDATA tests (#830)
• [FIX] Added mocks for node.js streams cork/uncork in tests (for node >= 4.x) (#829)
• [ENHANCEMENT] Added basic CDATA support (#787)
• [DOC] Added missing documentation about Client.setEndpoint(url) (#827)
• [ENHANCEMENT] Added toc node-module in order to generate TOC in README.md via npm run toc command (#826)
• [FIX] Fix elementFormDefault handling (#822)
• [FIX] Added missing compress node-module to package.json dependencies (#823)
• [ENHANCEMENT] The client response event is now triggered with the "raw" IncomingMessage object as second parameter (#816)
• [DOC] Added note about the keep-alive workaround to prevent truncation of longer chunked reponses in node > 0.10.x (#818)
• [ENHANCEMENT] Make it possible to overwrite the request module, e.g. for using multipart-body for file up- and downloads (#817)