implement the viewport window
add locate button to viewport
add open extra viewport to map button on top toolbar
Merge branch 'master' into viewport-window

Conflicts:
	projects/openrct2.vcxproj.filters
fix the /bin issue in the install script
Merge pull request #523 from mzmiric5/master

fix the /bin issue in the install script
Merge pull request #520 from IntelOrca/viewport-window

Viewport window
resolves #522, updates readme to reflect new SDL location
Merge pull request #524 from mzmiric5/master

resolves #522, updates readme to reflect new SDL location
add missing breaks in dropdown switch for top toolbar
refactor input (flags in particular) and add sub_6EA73F
fix #525, creating a ride crashes when footpath window is open
refactor window search functions
0x006BC3AC, 0x00405199, 0x00404E0D, sort audio functions by address, volume fading
0x006EC9CE
fix things
Fixes #527. Error caused by passing a variable a factor of 8 out.
Merge pull request #526 from zsilencer/master

fix some sound issues
Merge pull request #529 from duncanspumpkin/fix_527

Fix #527