Extended token parsing for config files when paths are defined dynamically
Removed `imagecapturer' as direct dependency from `symboliclog'

The image capturer component is not a necessary component for the symbolic log. If no plugin is loaded to store images, it is just not done.
Added function for finding previous actions of nodes
Forward symbolic events when new nodes were added to the symbolic log
Merge branch 'master' of github.com:fairlight1337/beliefstate