Allow app to be manually started
Bump version
Fix ENV tests in deploy macro
Bump version
Handle database seeding
Bump version
Add some default values for most registry usage:

* default unicorn path;
* default www pid path;
* default www sock path;
* default bundler unset groups;
* make queues and workers optional
Create public/assets directory
Allow file creations on app init
Stop app only when queue is configured
Extract new macros from `deploy' macro:

* deploy_init
* deploy_update
* deploy_restart
* deploy_stop
* deploy_start
Update for producer 0.4.x status options
Fix bundler groups removal
Simplify foreman processes configuration