another update to readme file

README.md

@@ -2,7 +2,8 @@
 Fortran program to simulate beta-delayed particle emission. 
 
 # Detailed description
-A detailed description can be found [here](https://git.kern.phys.au.dk/oliskir/bedepe/blob/master/description.pdf).
+A detailed description can be found [here](https://git.kern.phys.au.dk/oliskir/bedepe/blob/master/description.pdf). 
+See also [this note](https://git.kern.phys.au.dk/oliskir/bedepe/blob/master/spincoeff.pdf) on the spin-dependent coefficients.
 
 # Files
 - Simulation program: [bedepe.f](https://git.kern.phys.au.dk/oliskir/bedepe/blob/master/bedepe.f)
@@ -47,6 +48,7 @@ The example input file is for simulating beta-delayed alpha emission from 8B ass
 # Comments
 Feel free to contact me with questions or comments. Already now, I can point to one way in which the simulation program may be improved, namely, by including Coulomb effects in the beta phase-space function.
 Also, it would be very useful if one could simulate a distribution of excitation energies in the daughter nucleus, specified by an analytic function or a histogram.
+(Currently, the program only allows fixed excitation energy.) 
 Finally, the program should be rewritten in C++ and linked to ROOT libraries instead of PAW.
 
 # References