changed price from float to int

It is a horrible practice to have anything money ever be a float.
http://www.postgresql.org/docs/current/interactive/datatype-money.html
http://c2.com/cgi/wiki?FloatingPointCurrency

There are a lot of pull requests that I have in mind, I am not sure if you want me to do them all individually like this one or do one large one.
Merge pull request #1 from Sophrinix/patch-1

changed price from float to int