SES-1913 parser now processes last item in IN operator.
SES-1913 using QueryEvaluationUtil.compare to check list membership, and
dealing with possible type errors in comparisons cf. sparql rec.
SES-1913 added a few simple tests, all greenline.
SES-1915 normalization/validation of floating points modified to check
for max exponent/mantissa _after_ converting to canonicalized rep.
SES-1914 modified regex for xsd:time validation to allow for inclusion
of milliseconds. added positive and negative test cases to unit test.
SES-1915 added one extra unit test
SES-1915 removed TODO since case is already handled
SES-1913 improved handling of type errors to deal with errors in
evaluation of list elements (e.g. "1/0").
Merged in ses-1913 (pull request #186)

SES-1913 two bugs in ListMemberOperator implementation
Merged in ses-1915 (pull request #187)

SES-1915 validation of xsd:float, and SES-1914, validation of xsd:time