adding infrastructure for variable rec & mut rates
make forest respect rec rate changes
ensure that model is reseted between loci
remove unneeded check
add command line options for rate changes
fix problem in debug code

which occurred when two events happened at the same time. This seems to be
possible with growth and might be introduced by the fastlog/fastexp functions,
but should not be a problem for the production code.
ld_test debugging
add test for pruning comparison for the approximation
add cluster simulation scripts
edit parameter
change cluster job name
process data
edit grep stats file
edit data process
add r script to generate the figures
change r test
add r printing table
ipython notebook update
change y axis tricks label
run more ms_simulation and add scrmprune 10000