WIP -- refactoring

todo.txt

@@ -1,5 +1,11 @@
-- rethink scale names: is unit satoshi or btc? cryptoAtom, cryptoAtom
-- cryptoCoin is record, not code
 - specify crypto and fiat for trades
 - make sure ticker is in full coins
 - getDeviceRate should return bignumber
+- test with l-m
+
+backwards compatibility:
+
+- new l-m must be backwards compatible with old l-s
+
+- parse out bignumber when loading in routes
+- making a trade -- convert to units