Update the gem for Pixate 2.1

The framework has been renamed to PixateFreestyle. I left the
references to Pixate as “Pixate” for compatibility.
Update readme
Missed a spot
Removed license and updated Readme
Merge pull request #8 from killion/master

Update the gem for Pixate Freestyle 2.1
Update files to support Pixate Freestyle 2.1
update read me
Update README.md
Update README.md