Kast in k

I created this diff for use in managing the discussion on the KORE syntax. We may choose to close it rather than merge it, I just need a place to put comments.
@dwightguth We know there are still details like this to be taken care of; in the interest of time-to-market, we decided to pick whatever regexes were good enough to parse the three examples we have in this folder, and be prepared to refine them later.  Also, I really dislike Java's approach to write double backslashes in regexes, only because it treats them as ordinary strings.  Scala has something like this `raw"a\nb"`, which is equivalent to the string `"a\\nb"`.  We may also adopt something like that.  But, again in the interest of time, we decided that these are relatively small issues that can be fixed after the deployment of KORE.