added sponsors to README
require litecoin >=0.8.5.1
format durations on web pages by automatically choosing an appropriate time unit
reorganized format_dt
print RPC URL of merged mining daemon whose getauxblock call failed
terracoin blockexplorer url update.

 - cryptocoinexplorer.com now uses a separate TRC virtualhost instead of
   a different http port.
Merge pull request #143 from terracoin/blockexplorer_url_update

terracoin blockexplorer url update.
Update Makefile to use virtualenv 1.10.1
Merge pull request #144 from kevinxucs/virtualenv-1.10.1

Update Makefile to use virtualenv 1.10.1
Merge branch 'master' of https://github.com/forrestv/p2pool