Changed value comparison in AbstractTable and ReplacementTable to be loose when both values are numeric.
Remove mistakenly left var_dumps.
DataSet_AbstractTable::getValue() cast to string if SimpleXMLElement.

Don't cast everything to string as that can mess up floating point
numbers and casts NULL to empty string.
Merge pull request #114 from paulyg/bugfix-table-value-compare

Changed value comparison in AbstractTable and ReplacementTable to be loo...