Added credits Steve and Phillip for charge.pppm and pair.ewald. Also added kissFFT license info to the documentation.
Added credits Steve and Phillip for charge.pppm and pair.ewald.
Also added kissFFT license info to the documentation.

git-svn-id: ec9b07885974bb3173b21955f95968a785f5a7c2@3757 fa922fa7-2fde-0310-acd8-f43f465a7996

joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue