Custom build to work around vSphere providers limitations

custom build to work around issues due to providers using proxies that :

• timeout on a clone
• don't always return the content-length or encoding when gzip

To install in your .vagrant.d before you install vagrant-vsphere do

gem install nokogiri --install-dir ~/.vagrant.d/gems/ 
gem install trollop --install-dir ~/.vagrant.d/gems/ 
gem install  --install-dir ~/.vagrant.d/gems/ --local path/to/rbvmomi-1.8.3.proxy.gem

Then install vagrant-vsphere vagrant plugin install vagrant-vsphere