* returns a new Hashtable[] of size maxSeqLength, if Hashtable not supplied.
* This class is used extensively in calculating alignment colourschemes that
* depend on the amount of conservation in each alignment column.
* returns a new Hashtable[] of size maxSeqLength, if Hashtable not supplied.
* This class is used extensively in calculating alignment colourschemes that
* depend on the amount of conservation in each alignment column.