vagrant/doc/ubuntu_x86_vagrant_readme.txt: Added notes about host-only networking; started section on remote debugger.
vagrant/doc/ubuntu_x86_vagrant_readme.txt: Added PyDev remote debugging instructions.
vagrant/doc: Moved Eclipse content into a separate readme file.
vagrant/doc/vagrant_and_eclipse_readme.txt: Edits.
vagrant/doc/vagrant_and_eclipse_readme.txt: Edits.
Removed vagrant/downloads, testing bootstrap.sh with libmemcached-0.53.