Make seash use fastnmclient

This is a lot faster (!), and fixes a few logical bugs in the way
nodes are contacted, messages signed, etc.

Proposed fix for SeattleTestbed#83.

Author: aaaaalbert

scripts/config_build.txt

@@ -7,13 +7,14 @@
 ./modules/uploaddir/* modules/uploaddir
 ./modules/variables/* modules/variables
 
-
 DEPENDENCIES/repy_v2/*
 DEPENDENCIES/portability/*
 DEPENDENCIES/seattlelib_v2/*
 DEPENDENCIES/affix/*
 DEPENDENCIES/affix/components/*
 DEPENDENCIES/common/*
+DEPENDENCIES/nodemanager/fastsigneddata.py
+
 
 # Tests
 test DEPENDENCIES/utf/*

seash_helper.py

@@ -43,7 +43,9 @@
 # For loadstate and savestate
 serialize = dy_import_module("serialize.r2py")
 
-nmclient = dy_import_module("nmclient.r2py")
+# Use fastnmclient rather than the Repy implementation
+# (See SeattleTestbed/seash#83)
+import fastnmclient as nmclient