Escape strings before putting them into XML.
Merge pull request #18 from scraperwiki/xml-escaping

Escape strings before putting them into XML.
Version 0.4.1
Merge branch 'master' of github.com:whitehat2k9/PyExcelerate
Use absolute version number in setup.py to prevent premature import errors
Update README.md
Merge branch 'master' into dev