PlanIt - Waterworks

Reworked how rivers are placed to show the location of the path they will take, as well as handling the path finding in the background so there is no more related lag spikes. 

I have added some basic models for cattails and coral to help break apart the emptiness of oceans and lakes.

Also reworked the cell highlighter to give you a better idea of the selected location.

Sharpen/Flatten tool added which can be used to  create more refined slopes and hills.

If you have an idea of a feature you would like in the game, suggest it below!