CB-6084: clarify need for ant

Make the ant pre-req more clear, and note that OSX Mavericks dropped the
built-in ant. Also fix some typos of angle brackets needing to be escaped
as HTML entities.
added 3.4.0 for other languages
Add missing config.json to docs/sl/x.x.x/
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-docs into 6085_win8_compat

 merge with master
[CB-6085] fix punctuation
[CB-6085] more accurate req's for windows8