Read configured user agents
THE FUTURE IS NOW
lock mustache to a ruby 1.8 version
expect activesupport with any tiny version
Sort deps by name so mustache is first
Fix RubyGems 2.2+ compatibility.

RubyGems allows since version 2.2 to reconfigure place, where binary
extensions are stored. This might allow easier sharing of gems between
various Ruby interpreters. It can be enabled by redefining
Gem.default_ext_dir_for method.

This patch is adding support for this feature into Bundler.
Only re-activate bundler if it was once active.
Re-enable odler cleanup method to support older RubyGems.