Add rake task to run tent-validator validations
Exit with status 1 when exception occurs
Setup travis
Propagate exit status
Update exception message when database url missing
Add build status to README
Swollow invalid pid errors when killing process

(It doesn't matter if it's already dead)
Ensure rackup file present
Ensure TEST_DATABASE_URL given
Swollow Interupt error when waiting for tentd to start
Add debug info to missing TEST_DATABASE_URL
Fix travis config filename
Remove debug
Use 0.3 TentClient
Setup TentValidator with server meta
Fix travis config
Fix Gemfile reference to tent-client
Fix exit status and don't print request log for validator_spec rake task
Don't track Gemfile.lock
Add dependency