Extra JS

Modifications to append extra JS
Comments fixed
test Scope
PrependAppend added

Added Propertys;
prepend_extra_js:boolean
prepend_extra_js_string: string to prepend js-code
append_extra_js:boolean
ppend_extra_js_string:estring to append js-code
Merge pull request #4 from mexiCoders/ADDON_addig_actions

Addon adding actions