add rct_ride_type structure
Updated lots of ride descriptions and other things

'air time' is now 'hang tijd', we might just want to keep calling it 'air time', I'm not certain.

Changed autorondrit to rit in een karretje, which is what I remembered it as from my youth. Smalspoorweg also got changed to miniatuur spoorbaan, as most theme parks would refer to them as such.

Renamed the Heartline-twisteractbaan to Heartline-kurkentrekkerachtbaan. Twister = kurkentrekker.

Stoelrot. changed to Stoeldraaing (I'm not sure if it fits, otherwise revert to Stoelrot.)

Also changed a whole bunch of other things down the road. This is fun!
Merge pull request #362 from xzbobzx/patch-1

Updated lots of ride descriptions and other things
Created named address RCT2_ADDRESS_SCENARIO_TICKS

* 0x00F663AC is now named RCT2_ADDRESS_SCENARIO_TICKS. This variable
starts at an arbitrary value, defined by the current scenario, and
increments by 1 on every game tick.
* Also, added meaningful name to some variables in draw_light_rain and
draw_heavy_rain.
Update gfx_draw_rain declaration to match definition
First pass at 0x00406C96
Merge pull request #363 from marcotc/rain

Created named address RCT2_ADDRESS_SCENARIO_TICKS
Merge pull request #365 from jcdavis/master

First pass at 0x00406C96
Did some more work

The tutorials (is there a name in Dutch for tutorial, btw?) still have to be done, and there's a few phrases missing here and there, but otherwise it's coming together nicely.
Merge pull request #366 from xzbobzx/patch-1

Did some more work
add and start implementing ride window
Done the dutch tutorial. Dutch is almost finished.

There are a few spare phrases laying around here and there that need translating, and I wouldn't count on my spelling to be 100% perfect.

We'll also need someone to check for consistency in the naming of things.

Other than that, this language is ready to ship.
Merge pull request #367 from xzbobzx/patch-2

Done the dutch tutorial. Dutch is almost finished.
stop working directory from changing on load and save
Merge pull request #364 from zsilencer/master

Additional sound decompilation and fixes
sound_fill_buffer, sound_prepare