Only collapse date picker on mobile (when innerWidth > 500)
Merge branch 'development' of https://github.com/nicoverbruggen/hyperRail into development

* 'development' of https://github.com/nicoverbruggen/hyperRail:
  Only collapse date picker on mobile (when innerWidth > 500)
  Collapsible date picker (collapsed by default) #23
  Removed plan another trip button #63
  Basic contributors page #30 (please add in your own personal details, like twitter handle, etc if you want)
Merge branch 'development' of https://github.com/iRail/hyperRail into development

# By andreasDL
# Via andreasDL (2) and others
* 'development' of https://github.com/iRail/hyperRail:
  resolved issue #78