Update README.md

Update vagrant berkshelf version and newer version of vagrant has new hashie/hash_extensions requirements.
Merge pull request #7 from btmash/master

Update README.md
Merge pull request #8 from paulwc/master

Fix for solr/gsearch, adding usage stats module. Closes #8
Merge recipes; clean up tomcat restarts; tweak Vagrantfile
Merge pull request #6 from ryersonlibrary/master

Update to latest from MJ