consolidate proxy handling, combining https/http/params checks into one set of if/else
proxy settings should pull from connection instead of params (allows using Excon.defaults[:proxy])
properly raise connect timeout errors
use non zero timeout value in tests, as 0 means do not timeout for Timeout::Timeout
change recommended standard intrumentor env to EXCON_DEBUG
remove readline nonblock protections (they didn't fix the windows issues)
Don't swallow SSL exceptions
Merge pull request #140 from jacobat/ssl-exception-fix

Don't swallow SSL exceptions
consistency fixes for ssl error raising
do SNI in ssl_socket setup
closes #133
use Excon::Response#parse to read https proxy response
Release 0.15.5
create nonblock option, default to true

closes #129
describe idempotent and nonblock options in readme
fixes for blocking timeouts in 1.8.7
Release 0.16.0
specify SSLv3 specifically
Release 0.16.1
Provide more helpful backtraces on connection requests
Provide more helpful backtraces on one-off requests