Test against latest versions of Django 1.4 and 1.6
Test against latest versions of Django 1.4 and 1.6

Instead of testing against specific versions, we’ll test against the
latest released versions of each supported Django release.

Aaron1992/wtforms,hsum/wtforms,crast/wtforms,Aaron1992/wtforms,jmagnusson/wtforms,wtforms/wtforms,skytreader/wtforms,subyraman/wtforms,pawl/wtforms,Xender/wtforms,cklein/wtforms,pawl/wtforms