add _changes?feed=live sugar for continuous

allow `feed=live` as sugar for `continuous` which is hard to type.
PouchDB already supports `live`.

PRs for the change:
https://github.com/apache/couchdb/pull/307
https://github.com/apache/couchdb-couch/pull/40
https://github.com/apache/couchdb-chttpd/pull/28

closes COUCHDB-2237
2 files changed
tree: 2d60695eadecd77e7a0b82c5d6ec77c0315fc37e
  1. priv/
  2. src/
  3. test/
  4. LICENSE