ignore file for cruft produced by running autoreconf
Allowing xml:base in types derived from Base

This fixes the issuse alluded to in:
   http://sourceforge.net/mailarchive/message.php?msg_id=31798087
Changing the primitive type forAbstractTokenList

This is now string rather than double. This change was needed
for supertreebase/data/treebase/S99.xml validate
Documenting the decision to add just xml:base

This explains the commit df0853b29015a86b8dd7f9b9772cb47221db7439
more fully.
Merge pull request #8 from mtholder/supertreebase-validation

Fixes #11 and allows xml:base on annotations.