New Feature:
Sequence identifier now has edit distance from cluster reference sequence included as a fourth number in the identifier.

Bug Fixes:
Fixed bug that would prevent sequences from being added to a cluster after the maximum number of clusters had been found.
Removed spurious dependency on Getopt::Long::Descriptive

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#	modified:   dist.ini
#	modified:   lib/Bio/App/SELEX/RNAmotifAnalysis.pm
#	modified:   t/cluster.t
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