molpopgen/fwdpp: fwdpp 0.6.1

Maintenance release fixing the following two bugs:

• A bug that resulted in the failure to transmit a mutation if it was on parental gamete 2 AND its position equalled the left edge of a recombinant interval has been fixed. The bug was issue 134 and it was fixed via PR 135.
• A bug in fwdpp::update_mutations was fixed via PR 132.

The following features were added:

• fwdpp::compact_mutations was added, which reorganizes data structures for better memory access, thus improving performance. When used appropriately, significant run time improvements are possible.

The following API issues were addressed:

• The initialization of gamete counts in fwdpp::popbase is now independent of ploidy. PR 136.