Add Support for scripting languages

[gab1one]

I implemented the scripting languages that worked right away in:
#67

The goal is to support the following languages:

Stable release available

• scripting-java
• scripting-jython
• scripting-jruby
• scripting-javascript
• scripting-groovy
• scripting-beanshell
• scripting-clojure

No stable release available:

• scripting-renjin
• scripting-scala

require external tool installation & configuration

• scripting-matlab
• scripting-cpython

A language is supported if

• A node exists for each scripting language.
• The scripting node and den command loader node both support the language
• There exist test-workflows which test the language in all detail on all common OS (Win8, Win10, MacOS, Ubuntu,...)
• The code hiliting and (if applicable) the code assistant is working

[gab1one]

export to single issues