added accumulate boolean to cmfd.xml to toggle tally accumulation. doesn't do anything yet
changed name of accumulation variable from accum to cmfd_accum for consistency
revamped logic in cmfd_init_batch, added cases for cmfd_accum, added output of T/F flag to indicate batches where cmfd tallies are flushed
Fixed output formatting issues for cmfd batch flush flag
fixed some leaks identified by valgrind. Mostly uninitialized names and values for output purposes
cmfd working with OR with accumulation. output file now contains std dev estimate if cmfd accum is turned off
Last commit before starting split, roulette method work
Code is now reading in roi variables and cell roi and buffer indicators