remove the dependence between tables and table

[astaxie]

As tables is the implement of table. So tables like the drivers, while
table like database/sql. while drivers need to regiester in the init.

[c4pt0r]

any elegant way to do this?

[astaxie]

It's the best way for implement and interface.

the same style as database/sql

import "database/sql"
import _ "github.com/go-sql-driver/mysql"

db, err := sql.Open("mysql", "user:password@/dbname")

[coocood]

golint reports
"infoschema.go:25:2: a blank import should be only in a main or test package, or have a comment justifying it"

[astaxie]

@coocood good catch. astaxie@bb78a34

[ngaut]

LGTM

[c4pt0r]

LGTM