Added more examples

examples/mexists.lua

@@ -1,6 +1,6 @@
 local exists = {}
 local existence
 for _, key in ipairs(KEYS) do
-  table.insert(exists, redis.call('exists', key))
+	table.insert(exists, redis.call('exists', key))
 end
-return exists
+return exists

examples/mhmset.lua

@@ -0,0 +1,8 @@
+local hash, key, value
+for i = 1, #KEYS, 3 do
+	hash  = KEYS[i]
+	key   = KEYS[i + 1]
+	value = KEYS[i + 2]
+	redis.call('hset', hash, key, value)
+end
+return "OK"

examples/mhmsetnx.lua

@@ -0,0 +1,8 @@
+local hash, key, value
+for i = 1, #KEYS, 3 do
+	hash  = KEYS[i]
+	key   = KEYS[i + 1]
+	value = KEYS[i + 2]
+	redis.call('hsetnx', hash, key, value)
+end
+return "OK"