Matcher re implementation

See merge request !15

First Version of post mortem handler, sth. still not right with some states; Added some error messages

Bugfix in deepcopy of goal nodes: showed itself wehn using variables declared before a try statement

Gradle

See merge request !13

* gradle:
  new ci file
  Now copy to clipboard contains parsable string
  fixed instantiate commadn in key sources
  build for cradle
  other key versions
  commit for interactiveModeController
  Sortskript of Quicksort
  contraposition skript angepasst multiple Open Goals Fix
  gradle build