Add Capistrano deploy steps to README.md
Add Capistrano deploy steps to README.md

studentinsights/studentinsights,erose/studentinsights,jhilde/studentinsights,erose/studentinsights,studentinsights/studentinsights,studentinsights/studentinsights,studentinsights/studentinsights,codeforamerica/somerville-teacher-tool,codeforamerica/somerville-teacher-tool,erose/studentinsights,codeforamerica/somerville-teacher-tool,jhilde/studentinsights,codeforamerica/somerville-teacher-tool,jhilde/studentinsights,erose/studentinsights,jhilde/studentinsights