Rearranging vagrant configuration files to put Vagrantfile in top-level directory.
Changed configuration process to automate more steps, mostly in editing of bashrc files.
vagrant/doc/ubuntu_x86_vagrant_readme.txt: Added Eclipse instructions, moved troubleshooting steps into their own subsections.
vagrant/doc/ubuntu_x86_vagrant_readme.txt: Cleanup edits.
Vagrant files: Miscellaneous bug fixes. bootstrap.sh now only replaces configuration files on its first run, except for pg_hba.conf, which must be replaced every time after the database cluster is dropped and re-created.
vagrant/doc/ubuntu_x86_vagrant_readme.txt: Removed reference to makahiki virtualenv (no longer used)
Merge pull request #553 from jtakayama/master

Requesting pull of Vagrant files.