Update default Vagrant to v1.4.3 for testing
Ensure that Travis has new enough Bundler

Current Vagrant master requires newer than the default there.
Upgrade tailor to v1.4

Switch off the double quote warnings.
Fix hooking to provisioner runs

Thanks to @fgrehm for the correct way of hooking!
Split capability, config, and hook registration to own files

Stolen from https://github.com/fgrehm/vagrant-cachier/commit/b8fcfb95
Don't print messages when configuring something

Decrease the noise level a bit.
Release v1.1.0
Bump version for development
Update Vagrant downloads link
Add support for Git proxy through system config.

This adds support for overriding the HTTP proxy for Git by setting the
system configuration. It uses the git command itself to write to the
config file.
Add support for Subversion HTTP proxies.

I ran into this while attempting to build MRI 1.8.7 which seems to
checkout from the old Subversion repository. At any rate unfortunately
ti seems that Subversion itself doesn't have a `config` command so we're
left with simply writing it directly to /etc/subversion/servers.