0.4.1 fixed documentation for metrop

 0.5   changed licence to X11 (was AFL, which apparently sucks)

       changed to NAMESPACE
       cleaned up latex in inst/doc, added Makefile
       removed src/Makevars

       had to get rid of R_IsNaNorNA in src/metrop.c

       generally, lots of changes to get ready for CRAN

       all of the tests/*.Rout.save redone because the digits
       in numerical printing seem to have changed -- cannot get
       bit for bit identical with earlier R (even before code changes).

       changed first arg of metrop from "o" to "obj"

 0.5-1 changed package vignette to fix bogus MCSE calculation
       (bogosity still admitted and explained in appendix).

 0.6   added initseq function

 0.7   added temper function -- not tested yet

 0.7-1 fix bug && to ||
       much confusion about whether my_i and my_j were 0-origin or 1-origin
       forgot to allocate debug_acceptd
       confusion about dimension of state (nx + 1 vector if serial,
           ncomp x nx matrix if parallel) and <= nx versus < nx in loop bounds
       bug where my_swapped_proposal_log_dens was used twice when one should
           have been my_swapped_coproposal_log_dens
       bug in dimension of debug_state when parallel (last dim nx not nx + 1) 
       accepted swap didn't actually swap, fixed
       all the accept decisions when log_hastings_ratio < 0 were backwards
       batch means accumulation has = instead of +=
       batch means divided by nbatch rather than blen
       accepti entries stored in wrong places in output structure
       ripped out old system for caching lud values, put in new that caches all
           (more efficient, but real reason was old was broken somehow)
           of course, its first implementation had 0-origin vs 1-origin confuse
       yet another instance 0-origin vs 1-origin confusion (my_i should be
           my_i - 1
       length of output structure (len_result) determined incorrectly, fixed
       caching of current lud value broken in serial case (stored in i not j)
       after all that, everything now checked even with --use-valgrind and
           --use-gct

 0.7-3 add bugs section to initseq.Rd
       fix example in temper.Rd to actually be for temper rather than metrop
       fix comment in temper.c
       add inst/doc/debug.Rnw a vignette about debugging and debug output