Changes with respect to v1.0:
	* Removed mask moves.
	* Removed binweights and associated dothisbin.
	* Removed stored reverse-complement base-counts.
	* Other memory reductions.
	* Color-number no longer fixed even when running without colour
	  moves (-c 0). The specified number of colors is now upper bound
	  on the number of colors allowed.
	* Gibbswindowmove replaced with Switchwindow. A randomly colored
	  window is chosen and uncolored. A new colored window is put in
	  its place anywhere in the sequence group that the window came
	  from or in one randomly chosen other sequence group (if
	  available). Will allow new colors while ensuring number will not
	  exceed the upper bound specified.
	* External WM file can contain line specifying "NUMTF" which
	  specifies the total number of TFs that exist beyond those for
	  which motifs are given in the file. In this way one can control
	  how many of the motifs are expected to come from the WMs in the
	  file and how many from other WMs.
	* Non-standard letters in aligned file are replaced with X
	  (position blocked)
	* More extensive checking of nonsensical or contradictory input 
	  parameters.
	
