WIXBUG:4443

Ensure that MsiPackages in a Bundle have ProductVersions that fit in a
QWORD, how Burn represents a four-field version number with each field a
WORD.
Wordsmith the error message a bit...
Fix tests after refactoring into separate proj
Merge pull request #67 from heaths/tests

Fix tests after refactoring into separate proj
Merge pull request #65 from barnson/wixbug.4443

WIXBUG:4443