Basic altcoin framework, full Litecoin support

- LTC: tested on mainnet, full test suite support
- simultaneous autosigning for all supported coins (BTC,BCH,LTC)

cmds/mmgen-addrimport

@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+
+# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
+# Copyright (C)2013-2017 Philemon <mmgen-py@yandex.com>
+#
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation, either version 3 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+mmgen-addrimport: Import addresses into a MMGen bitcoind watching wallet
+"""
+
+from mmgen.main import launch
+launch("addrimport")