add capistrano rbenv maintentance
switch to using github rather than git in Gemfile

this is suppose to fix a problem where travisci could not download gem from github
add to travis config
remove rb-env-maintenance

requires root
the responsibility of rb-env-maintenance will be delegated to chef scripts with root access
add SMTP_DEFAULT_URL env var to travis
make correct database config for travis
add newrelic_rpm
Implement bootstrap3 via gem