Add version to ChannelManagerContract

Author: LefterisJP

.bumpversion.cfg

@@ -13,6 +13,10 @@ serialize = {major}.{minor}.{patch}
 parse = contract_version = "(?P<major>\d+)\.(?P<minor>\d+)\._";
 serialize = contract_version = "{major}.{minor}._";
 
+[bumpversion:file:raiden/smart_contracts/ChannelManagerContract.sol]
+parse = contract_version = "(?P<major>\d+)\.(?P<minor>\d+)\._";
+serialize = contract_version = "{major}.{minor}._";
+
 [bumpversion:file:raiden/smart_contracts/EndpointRegistry.sol]
 parse = contract_version = "(?P<major>\d+)\.(?P<minor>\d+)\._";
 serialize = contract_version = "{major}.{minor}._";

raiden/smart_contracts/ChannelManagerContract.sol

@@ -8,6 +8,8 @@ import "./ChannelManagerLibrary.sol";
 // deployment the logic is moved into a library and this contract will work
 // only as a proxy/state container.
 contract ChannelManagerContract is Utils {
+    string constant public contract_version = "0.0._";
+
     using ChannelManagerLibrary for ChannelManagerLibrary.Data;
     ChannelManagerLibrary.Data data;