Next: update README.md to use `TextField` with `select` property instead of `Select`

[srghma]

lets use

import { Field } from 'redux-form'
import { TextField } from 'redux-form-material-ui'

      <Field
        name="rank"
        label="Rank"
        component={TextField}
        select
        placeholder="Rank"
        onChange={handleRankInput}
      >

everywhere instead of

import { Field } from 'redux-form'
import { Select } from 'redux-form-material-ui'

      <Field
        name="rank"
        label="Rank"
        component={Select}
        placeholder="Rank"
        onChange={handleRankInput}
      >

because Select doesnt have label property