an article about writing fixes in lammps

Hello, lammps users,

I recently wrote a small article [1] about writing fixes in lammps in
order to save somewhere knowledge I got about this issue. If you find
a misunderstanding or something, please let me know.
I hope someone will find it useful.

[1] http://kirilllykov.github.com/blog/2012/10/13/writing-fixes-for-lammps/