Disable specs that sometimes trigger bug causing hanging
Re-enable specs after verifying they only fail on unpatched Ruby 1.9.3
Don't overwrite sockfile_path if set explicitly
Write logs to install.log as well
Improved install logging
Refactor native ext installation to allow for better logging

We now warn if there was an actual installation error as soon as Skylight
is required. An unsupported architecture does not count as an installation
error.
Make install.log path explicit
Return prematurely removed require
Respects HTTP_PROXY env var during installation
Merge pull request #165 from tildeio/install-log

Log the output of extconf.rb to a log file
Merge pull request #167 from tildeio/proxy-install

Respects HTTP_PROXY env var during installation