title: Workflow migrations phalcon
body: <p>Time ago I worked with yii framework.
  In yii framework with yiic shell I make migration file and write actions for db: create table, alter table, create index and any actions with another (no db). 
  But in phalcon I don't see this. Yeah, I know about migrations, but what is it? </p>
  
  <p>I make migration for my db with one table;
  If I have empty db and use "phalcon migration run" then I have "table %name_table% don't exists"</p>
  
  <p>And how I can use this for normal migrations?</p>
  
  <p>And where phalcon save information about used migrations? Or every time start from 1.0.0 migration?</p>