Added xml parsing for excel xml dumps.
Added file_contents streaming to xml parser
Added fallbacks for xls and xlsx to load files as xml when file begins with xml header.
Bumped version number. Removed erroneous allset asignments.
Moved external dependencies into datawrap to avoid setup collisions.
Added spacing to seperate classes from functions.
Merge pull request #14 from MSeal/task/xmlParser

Task/xml parser