Parallelized Parallel Tempering template class implimentation in TParallelTempering<class L>; simulation xy-pt runs parallel tempering and outputs data in a more sane way, rather than only spitting out plots
Small fixes to TMultiXY: normalized coupling amplitude w.r.t. island volume
xy-twistcrit: simulates twists in an external field, adjusting temperature in order to estimate the critical temperature given a field value