finally fixed the most prominent bug, that is being featured on the front page of github-jedi -> class methods shouldn't return their params as a completion

jedi/api.py

@@ -108,7 +108,7 @@ class Script(object):
             for s in scopes:
                 # TODO is this really the right way? just ignore the funcs? \
                 # do the magic functions first? and then recheck here?
-                if not isinstance(s, evaluate.Function):
+                if not s.isinstance(evaluate.Function):
                     if isinstance(s, imports.ImportPath):
                         if like == 'import':
                             l = self.module.get_line(self.pos[0])[:self.pos[1]]