Added read_annotations_file() which reads a tab delimited file containing

annotations to identifiers along a dimension.

test/system/annotationtest.py

@@ -53,5 +53,10 @@ class AnnotationsTest(unittest.TestCase):
 
         assert h.get_annotation_names() == ['name']
 
+    def testReadAnnotationsFile(self):
+        ann = annotations.read_annotations_file('../data/annotations.fann')
+        assert ann != None
+        assert ann == annotations.get_dim_handler('dim1')
+
 if __name__ == '__main__':
     unittest.main()