add research window

As seen from RollerCoaster Tycoon 1. This allows the player to change the priorities in a "no money" park. I find it also more logical than the two research panels being separated in finances and new ride windows.
Merge pull request #299 from Gymnasiast/master

Another update for dutch.txt
Decompiled first part of left down
Added remaining left click on viewport functions
Moved old function comment to top of func
change options window to tab interface

To better group the options together and allow the window to be scalable with additional OpenRCT2 options, I have changed the window to a tab interface similar to the options window seen in Locomotion.
Merge branch 'master' of https://github.com/IntelOrca/OpenRCT2.git
Merge pull request #302 from duncanspumpkin/viewport_left_down

Viewport left down
Merge pull request #1 from IntelOrca/master

test for forked repo