Host class now uses dalli
Only patches the array with a sum method if none is present

e. g. Rails already provides this. In Ruby 2.0 one should use a refinement.
Removes memcache driver require from amnesia.rb
uses dalli gem
Updates gem spec with dalli
Updates to use dalli – missing error rescue fix
uses routes without prefix so it's mountable wherever we want
connects async to memcache, if a reactor is running
fixes a deprecated sinatra method
read me update with rails instructions; instructions for Rack are untested
minor improvements
fixes css path
swaps the google charting library
fixes stats retrieval for dalli
removes unnecessary to_s for chart url
correctly sets env variable
adds new to the read me instructions
flattens ENV hosts so you can set ENV["MEMCACHE_SERVERS"] = ['localhost:11211'] and ENV["MEMCACHE_SERVERS"] = 'localhost:11211'.
Merge pull request #6 from PingoUPB/master

easier Rails mount, updates some stuff and uses newer driver and gems