Built and copied from tools\cobra directory.

The js.jar file was renamed to js_ext.jar because js.jar is now also used by NetBeans (from 7.0) 
which causes issues when building the ZIP distribution. NetBeans excludes the js.jar because 
it is not used by die NetBeans modules _even though_ it is added explicitly for Cobra.

Changes to Cobra was also made to only allow the expand & collapse javascript code
in the Detail View and javascript in the start page, no other javascript is allowed.

XSS tests: https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet