configure mysql w/ capistrano

[jpstroop]

Need a strategy for keeping the passwords out for dev and prod.

Phase 1:

• Rename config/database.yml to config/database.yml.tmpl. database.yml should be be ignored by git.
• Set passwords and rename file manually after cloning.

Phase 2:
Use Capistrano. Two (similar) strategies:

• http://stackoverflow.com/a/15378559/714478
• http://stackoverflow.com/a/8879191/714478

For travis, try this strategy: http://stackoverflow.com/a/13776019/714478

[jpstroop]

Leaving open, but moving out of this milestone.