Fix bugs in ProfileHeader (#529)
Fix bugs in ProfileHeader (#529)

* fix: Use separate string replace methods to remove part of profile URL

There was a bug, if there was no http://www. in front of the URL, the
first 2 characters would be remove regardless.

There's probably a better way to do this, but for now, this quick fix
will work.

* fix: Use string propType for website prop in ProfileHeader

* fix: Add default prop values in ProfileHeader

* fix: Check props.intro in ProfileHeader before running toggleReadMoreLink method

lonelyplanet/backpack-ui,lonelyplanet/backpack-ui