3 bug fixes:
 1. Failure when character entities span a line in an attribute value
 (Sergey's bug)
 2. Failure when character entities span a line in a text node (George
 Lilly's bug)
 3. Reading XML documents from the File system, supported on Cache,
 didn't work on GT.M (My bug).
Unit tests for 3 bug fixes in MXMLPRSE