Hacky codeshift to use React's prop-types package

replace.sh

# https://facebook.github.io/react/blog/2017/04/07/react-v15.5.0.html#migrating-from-react.proptypes
# I didn't feel like downloading their codeshift.
#
# in all files in current directory, replace:
# import React, {Component, PropTypes} from 'react';
# 
# with:
# import React, {Component} from 'react';
# import PropTypes from 'prop-types';

perl -pi -e "s/import React, \{Component, PropTypes\} from 'react';/import React, \{Component\} from 'react';\nimport PropTypes from 'prop-types';/g;" *