prop-types compatibility

[rota-rossi]

right now the addon does not recognize the propTypes if using the new prop-types module.

import {PropTypes} from 'react'

import PropTypes from 'prop-types'

[burabure]

so is this in the works? are PR's welcome?
storybookjs/storybook#954

[TimGraf]

I'm seeing this issue again in v3.2.13.

[ndelangen]

Please open an issue on the main repository @TimGraf
https://github.com/storybooks/storybook

Please before you make an issue remove all node_modules and lockfiles and re-install.
Likely the issue will be resolved. If not, please do make an issue and we can take a look what's wrong.

Thanks!