Update php_nginx_vm.md

Reverse order of install for vagrant and virtualbox.
Update php_nginx_vm.md
Update php_nginx_vm.md

Broke up manual and automated builds into sections.
Enforce EOL LF settings.

Git on Windows machines will automatically convert EOL characters to
CRLF, which confuses the shared files on the linux virtual machine
guest.  Forcing LF characters should solve this problem.
Merge branch 'master' into php55
Revert to production-style php source urls.  Bump version to 5.5 release.