make check add jsl

someday/maybe

get some perf numbers (timeit-based. 'Ben' isn't cutting it)
pjson-like coloring of JSON output: http://igorgue.com/pjson/

fix this in man page (ronn fix?):

  Index: /Users/trentm/tm/json/docs/json.1
  index 45f625f..7230bc5 100644
  --- a/docs/json.1
  +++ b/docs/json.1
  @@ -407,7 +407,7 @@ $ curl \-s http://github\.com/api/v2/json/repos/search/nodejs | json repositorie
       "created_at": "2009/06/26 11:56:01 \-0700",
       "pushed": "2011/09/28 10:27:26 \-0700",
       "forks": 345,
  -\.\.\.
  +\&\.\.\.
   .
   .fi
   .

Tips from mdocml.

Support slice indexing into an array: $ echo '["a","b","c"]' | jsondev '[1:]' ["b", "c"]