Migrate over to using pyosmocom

We're creating a 'pyosmocom' pypi module which contains a number of core
Osmocom libraries / interfaces that are not specific to SIM card stuff
contained here.

The main modules moved in this initial step are pySim.tlv, pySim.utils
and pySim.construct. utils is split, not all of the contents is
unrelated to SIM Cards.  The other two are moved completely.

Change-Id: I4b63e45bcb0c9ba2424dacf85e0222aee735f411

pySim/apdu/ts_102_221.py

@@ -22,11 +22,12 @@ import logging
 
 from construct import GreedyRange, Struct
 
-from pySim.construct import *
+from osmocom.utils import i2h
+from osmocom.construct import *
+
 from pySim.filesystem import *
 from pySim.runtime import RuntimeLchan
 from pySim.apdu import ApduCommand, ApduCommandSet
-from pySim.utils import i2h
 from pySim import cat
 
 logger = logging.getLogger(__name__)