updated readme file

README.md

@@ -1,9 +1,28 @@
-MUSIC - a code for multi-scale cosmological initial conditions
-==============================================================
+MUSIC - multi-scale cosmological initial conditions
+===================================================
 
-This is the MUSIC code repository. This program is distributed 
-in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
-without even the implied warranty of MERCHANTABILITY or FITNESS 
-FOR A PARTICULAR PURPOSE. By downloading and using MUSIC, you 
+MUSIC is a computer program to generate nested grid initial conditions for
+high-resolution "zoom" cosmological simulations. MUSIC supports output
+
+- Supports output for RAMSES, ENZO, Gadget-2/3, ART, Pkdgrav/Gasoline 
+and NyX via pugins. New codes can be added.
+
+- Support for first (1LPT) and second order (2LPT) Lagrangian perturbation 
+theory, local Lagrangian approximation (LLA) for baryons with grid codes.
+
+- Pluggable transfer functions, currently CAMB, Eisenstein&Hu, BBKS, Warm 
+Dark Matter variants. Distinct baryon+CDM fields.
+
+- Minimum bounding ellipsoid high-res regions supported with most codes, 
+supports refinement mask generation for RAMSES.
+
+- Parallelized with OpenMP
+    
+- Requires FFTW (v2 or v3), GSL (and HDF5 for output for some codes)
+
+
+This program is distributed in the hope that it will be useful, but 
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+or FITNESS FOR A PARTICULAR PURPOSE. By downloading and using MUSIC, you 
 agree to the LICENSE, distributed with the source code in a text 
 file of the same name.