added little test

test.lua

@@ -0,0 +1,31 @@
+
+require 'lab'
+require 'allreduce'
+
+torch.setdefaulttensortype('torch.FloatTensor')
+
+if #arg == 0 then
+	error('please provide job number')
+end
+
+jobid = tonumber(arg[1])
+jobtotal = tonumber(arg[2] or 1)
+
+if jobid == 1 then
+	x = lab.zeros(10)
+else
+	x = lab.ones(10)
+end
+
+allreduce.init('localhost', jobid, jobtotal)
+
+print('job ' .. jobid .. ' - sending vector:')
+print(x)
+
+-- 3 different reduce types:
+allreduce.average(x)
+--red = allreduce.accumulate(x)
+--red = allreduce.best(x, score)
+
+print('job ' .. jobid .. ' - reduced vector is:')
+print(x)