summer 2014

added directory students/summer2014
 added each student, named by their github account

categories/index.html - line 38 - closed H3 tag

students/spring2014/tgrays/index.md - attempted to correct html that rendered as text

corrected links to spring 2014 linkedin accounts
 they were missing "http://" so the addresses were being appended to the current address

added myself (as a test) to users.yml

separated students by session and created additional table in students/index.html for summer session
students/spring2014/tgrays/index.md - attempted to correct html that rendered as text