<Mouse.h> is missing in sketch!

[Synergyst]

Hello, I am using your project for another purpose. (I wanted to be able to control which computer my mouse is assigned to using USB-IP)

I am using the Linux build of the Arduino 1.6.9 IDE. Although when I went to verify the sketch it claimed that I may need to add '#include <Mouse.h>' Once I added it I was able to compile it and upload it.

I thought I'd want to mark this as an issue as most who may want to use your project may not understand what is wrong.. Although this is a minor error, as my IDE caught it and told me explicitly what is wrong.