exposed AI script directory path to AI via the AIInterface to facilitate ai config process

git-svn-id: svn://svn.code.sf.net/p/freeorion/code/trunk@7777 dbd5520b-6a0a-0410-a553-f54834df5b05
modified AI patch by Cjkjvfnby making use of new AI config process

git-svn-id: svn://svn.code.sf.net/p/freeorion/code/trunk@7778 dbd5520b-6a0a-0410-a553-f54834df5b05