connection pool round 2
fetch_connection should be instance method
set inactivity_timeout
use custom connection pool
readme fix
dont set connection timeout on client
move pool to its own class, remove autoloading
pool specs
update readme
readme again
spell fix
remove unnecessary@@pool
use AWS.config.logger
this super simple pool does not need a mutex
use loop to get first connection attempt
lazy load connections
initialize @@pool_data
we do need a mutex, but not class instance variables
clean up, remove mutex again because multiple threads with fibers and em-http-request done play well together, so a mutex is pointless
re-add mutex just  in case