env is not defined, in DetectObject() in prpy.perception.apriltags.py

[DavidB-CMU]

in DetectObject() from apriltags.py, env is not defined.

/home/user/catkin_workspaces/herb_ws/src/prpy/src/prpy/perception/base.pyc
in call(self, instance, robot, _args, *_kw_args)
12
13 def call(self, instance, robot, _args, *_kw_args):
---> 14 return self.func(instance, robot, _args, *_kw_args)
15
16 def get(self, instance, instancetype):

/home/user/catkin_workspaces/herb_ws/src/prpy/src/prpy/perception/apriltags.py
in DetectObject(self, robot, object_name, **kw_args)
145 for obj in added_bodies:
146 if obj.GetName() != object_name:
--> 147 env.Remove(obj)
148 print "removed object"
149 else:

NameError: global name 'env' is not defined

[DavidB-CMU]

Please see PR #294