Added directions on how to create a shared folder on Windows, which maps to the open_camp folder in the user's Vagrantbox
Added some clarification of the end of Step 2b, and edited timing expectations from Step 2.
Changed some formatting for readme, added commented out symlink for windows users in Vagrantfile
minor formatting tweak
Merge pull request #15 from momer/add-windows-shared-directory

Add windows shared directory