Update Changelog.
Remove more user agent shortcuts.
Fix gemspec.
Fix verifypeer and verifyhost options.

Fixes #175.
Issue 156 - adding a default user agent.
Fix header transmission.
Bump version
Add release task.
Fix headers.
Bump version.
Document changes in 0.4.1 and 0.4.2.
Escape zero bytes in header values.

Fixes #180.
Update Changelog.
Clean up the Readme and point to the website.
Fix list items in readme.
Don't modify the options when setting the user agent.
add support for :socks5_hostname proxy_type option, thus allowing hostname resolution on the server-side of the proxy

The SOCKS5_HOSTNAME option has been in libcurl ever since SOCKS4A was
added.  For some unknown reason the socks4a option was added to
typhoeus, but socks5_hostname was not.
Merge pull request #176 from sshingler/issue-156-default-user-agent

Issue 156 - adding a default user agent.
Set the default user agent as late as possible.
Merge pull request #183 from eweathers/master

add support for socks5_hostname proxy_type