Add support to intNumber and floatNumber

function intNumber (thing) {
    return number(thing) && thing % 1 === 0;
}

function floatNumber (thing) {
    return number(thing) && thing % 1 !== 0;
}
Expose the intNumber and floatNumber
Add support to email

See http://stackoverflow.com/a/46181/1044759
Add test for email, intNumber and floatNumber
put email, intNumber and floatNumber
Update check-types.js
Update README.md
Update README.md
intNumber => int style and simplify email

`intNumber` => `int`
`floatNumber` => `float`
`email` now is "seems like a"
replace intNumber => int, etc

`intNumber` => `int`
`floatNumber` => `float`
`email` is less ambitious
Merge pull request #20 from roro89/master

Add support for email, intNumber and floatNumber