test checking multiplicity parsing of group
Correct the new testFromAdjacencyList_multiplicity unit test.

Written by a java dev :-)
Fix bug in parsing group adjacency list multiplicities.

Also added comments for the somewhat complicated reg-ex.
Thanks for finding the bug, Nick.
Added another unit test for parsing multiplicity lists in group adjacency lists.
Merge pull request #281 from rwest/multiplicity-regex-bug

Multiplicity regex bug