independent vectors rather than the newest vectors.  I then changed the
svm_pegasos object so that it has a max number of support vector setting
so that the user can supply an upper limit on the number of support
vectors to use.  Note that these changes broke backwards compatibility
with the previous serialized format of these objects.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402928