Update README.md

Mostly cosmetic and fixing the wp-admin path since wordpress sits in its own directory under /vagrant
Merge pull request #10 from battlemidget/patch-1

Update README.md
Issue #2: added a httpd.conf file that changes the "user|group" that is used to run apache2 to "vagrant|vagrant" instead of "www-data|www-data"
Merge pull request #11 from savoirfairelinux/master

Issue #2 fix