Merge pull request #52 from MULTIBINIT/master

Update README.md

README.md

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 TB2J is a open source python package for calculating the magnetic interaction parameters in Heisenberg models from DFT. It use the magnetic force theorem and take the local rigid spin rotation as a perturbation in the Green's function method. 
 
+The TB2J project is initialized in the PhyTheMa and Nanomat teams in the University of Liege.
+
 The features include:
  - Calculates parameters in Heisenberg model, including isotropic exchange, anisotropic exchange, Dyzanoshinskii-Moriya interaction.
  - Can use the input from many DFT codes with Wannier90, e.g. Abinit, Quantum Espresso, Siesta, VASP, etc.