Improvements

[umitgoren]

Hi,

I have got two questions.

1. My first question is about how to modify the source code of Slide Fill Strategy in order to fill the empty grid slots as shown in the red rectangle below. In a regular match 3 game one would expect the middle column to be filled completely except the tile at the very top.
   

2. How can I merge the behaviours of Fall Down and Slide Down Strategies? I want to use the Slide Down Strategy, however, I want empty grid tiles to spawn new items as in the Fall Down Strategy. Can you please add such a strategy into the sample project?