'**SUMMARY**
This returns a dict with the name and current value of the
documented PvAVT attributes
CAVEAT: it addresses each of the properties individually, so
this may take time to run if there\'s network latency
**EXAMPLE**
>>>c = AVTCamera(0)
>>>props = c.getAllProperties()
>>>print props[\'ExposureValue\']'

def getAllProperties(self):

    props = {}
    for p in self._properties.keys():
        props[p] = self.getProperty(p)
    return props
