v0.7.0 Changes to run as a Heroku add-on
       Configuration now stored as a URL
       Now requires Heroku gem
       
v0.6.1 fixed query builder

v0.6.0 added query builder

v0.5.1 removed memcache dependency, added memcache-client

v0.5.0 removed utils, moved them to separate gem

v0.4.1 added start and end options to lw-compute and lw-tail

v0.4.0 added lw-compute tool, to run aggregate queries

v0.3.0 added lw-heroku tool, to push configuration variables to heroku

v0.2.0 removed app/ libraries. Added tail as a utility, lw-tail as a command

v0.1.0 initial version.