Name peep variables for current train and car
Fix finding peep on ride news items

Peep's current_* variables were offset by 1. Also fixed comparison
between 32-bit and 16-bit ints.
Change peep news item enum names
Add rct_car sprite and tidy up news locator

Also add (x,y,z) coordinate variables for rct_peep
Fix comments
fix case and add author to source code header
Merge remote-tracking branch 'refs/remotes/upstream/master'

* refs/remotes/upstream/master: (22 commits)
  fix bug with game_do_command
  add game_do_command
  add more info. to scenario_load_and_play
  set default screenshot format to PNG
  reorganise addresses
  fix peep structure
  Identified monthly ride income location.
  Label energy, thirst, hunger with offsets
  allow BMP to still be saved with PNG as default
  label nausea with offset
  Found nausea peep variable
  finish scenario start and add park size calculate
  Changed screenshot format from BMP to PNG (using LodePNG)
  add game flag for development only below tree height
  rename current day to current month ticks
  fix case and add author to source code header
  Fix comments
  Add rct_car sprite and tidy up news locator
  Change peep news item enum names
  Fix finding peep on ride news items
  ...

Conflicts:
	src/peep.h
Add map_element_height (finishes sub_662783)

Possibly wrong for some slopes...
squash! Add map_element_height (finishes sub_662783)
Change formatting to VS style, improve comments
Merge branch 'element_height' of https://github.com/ZedThree/OpenRCT2 into ZedThree-element_height
remove unfinished comment and credit author
Merge branch 'ZedThree-element_height'