Add FIND_PACKAGE feature

[piponazo]

I usually use the FIND_PACKAGE cmake feature with my personal projects instead of pkg-config tool. In order to use libfreenect library in my personal code I've added this feature to my personal branch. If you are interested in this contribution, I would love that you include this in the main branch :).

I hope I have done nothing wrong, this is the first time I use git.

[qdot]

Nice work! However, the commit needs a sign off (not something you did wrong with git, it's just part of our project policy). Check out the contributing code document at

http://openkinect.org/wiki/Contributing_Code

And let me know if you have any questions about getting this going.

[piponazo]

Thanks for your help qdot. After taking a look to the wiki page I've got this error message when I try to run the first command indicated in the "Forgetting to sign off after committing" section:

~$ git checkout -b signoff $(git merge-head origin/master)
git: 'merge-head' is not a git command. See 'git --help'.

I'm using Ubuntu 10.04, and the version of GIT that I've installed is 1.7.0.4.

[Goddard]

Is it libfreenect? because I built from source and using FIND_PACKAGE is giving me an error.