Merge pull request #144 from tmaher/master

Excon::Connection#inspect redacts authorization header
Release 0.16.2
remove overly paranoid const checking

closes #147
change chunk_size to be a param for consistency with other defaults

also allows changing this on a per connection and/or per request basis
Release 0.16.3
setup DEFAULT_NONBLOCK constant and warn when explicitly setting a separate value
closes #150
update deprecation/warning messages to use  instead of
closes #149
consistency fixes for inspect REDACT and add REDACT to standard_instrumentor
closes #145
cast instance_variable names to symbols for consistency outside 1.9
Release 0.16.4
Also retry Timouts on idempotent requests
Merge pull request #152 from zimbatm/retry-on-timeout

Also retry Timeouts on idempotent requests
Excon.stub will break out items from :url if supplied.
Merge pull request #153 from dpiddy/excon-stub-url

Excon.stub will break out items from :url if supplied.
loosen ssl version requirement, leave it up to server to negotiate

closes #154
eof on read should return '' instead of nil

closes #146
build host_port up front and reuse instead of rebuilding for every usage
set Proxy-Connection: Keep-Alive for https proxies
fix to postpone https upgrade until after proxy connect

closes #148
Release 0.16.5