diff --git a/init.lua b/init.lua
index c004474..df874d3 100644
--- a/init.lua
+++ b/init.lua
@@ -5,6 +5,7 @@ if _VERSION then
     end
     if _VERSION > "Lua 5.1" then -- TODO automatically use _ENV instead of s/getfenv if _VERSION > 5.1
         -- not throwing error("Too new Lua version! modlib requires Lua 5.1 or smaller.") anymore
+        unpack = unpack or table.unpack -- unpack was moved to table.unpack in Lua 5.2
         loadstring = load
         function setfenv(fn, env)
             local i = 1
diff --git a/log.lua b/log.lua
index 62e34c2..9bd2d3d 100644
--- a/log.lua
+++ b/log.lua
@@ -45,6 +45,10 @@ function write_all_to_file()
         write_to_file(name, channel, current_date)
     end
 end
+function write_safe(channelname, msg)
+    write(channelname, msg)
+    write_all_to_file()
+end
 
 local timer = 0
 
diff --git a/minetest.lua b/minetest.lua
index 4d27b0d..887256f 100644
--- a/minetest.lua
+++ b/minetest.lua
@@ -63,6 +63,15 @@ function check_player_privs(playername, privtable)
     return missing_privs, to_lose_privs
 end
 
+function box_box_collision(a, b)
+    for i=1, 3 do
+        if a[i] < (b[i] + b[i+3]) or b[i] < (a[i] + a[i+3]) then
+            return false
+        end
+    end
+    return true
+end
+
 minetest.register_globalstep(function(dtime)
     for k, v in pairs(delta_times) do
         local v=dtime+v
diff --git a/text.lua b/text.lua
index 601b52c..c2ce358 100644
--- a/text.lua
+++ b/text.lua
@@ -1,5 +1,11 @@
 -- TODO probably set string metatables ?
 -- String helpers - split & trim at end & begin
+function upper_first(str)
+    return str:sub(1,1):upper()..str:sub(2)
+end
+function lower_first(str)
+    return str:sub(1,1):lower()..str:sub(2)
+end
 function starts_with(str, start) return str:sub(1, start:len()) == start end
 function ends_with(str, suffix)
     return str:sub(str:len() - suffix:len() + 1) == suffix