pagination support queries in the Couch module
pagination support queries in the Couch module

* make `getChannelLog` more general, ie. allow an additional list of query
  args to be supplied
* remove the `descending=true` param, not all view queries use it
* add descending=true to `getLastMessages` so it behaves are previously
* add getPrevPage, getNextPage pagination queries
* add getAt to get 100 messages from a point in the history
* decode `_id` from a couch document to `id` of an `IrcMessage`

gdamjan/irclog-couchapp,gdamjan/irclog-couchapp