diff --git a/.gitignore b/.gitignore
index 9bea433..feff165 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,16 @@
+# LuaRocks #
+######################
+lib/
+share/
+bin/
+# OS generated files #
+######################
.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+Icon?
+ehthumbs.db
+Thumbs.db
\ No newline at end of file
diff --git a/ElementNode.lua b/ElementNode.lua
index 0acd32b..4d8fc3c 100644
--- a/ElementNode.lua
+++ b/ElementNode.lua
@@ -1,4 +1,5 @@
-local Set = require "Set"
+require("luarocks.loader")
+local Set = require("Set")
local ElementNode = {}
ElementNode.mt = {__index = ElementNode}
diff --git a/Set.lua b/Set.lua
deleted file mode 100644
index 104e31f..0000000
--- a/Set.lua
+++ /dev/null
@@ -1,87 +0,0 @@
-local Set = {}
-Set.mt = {__index = Set}
-function Set:new(t)
- local instance = {}
- if type(t) == "table" then
- if #t > 0 then
- for _,v in ipairs(t) do
- instance[v] = true
- end
- else
- for k in pairs(t) do
- instance[k] = true
- end
- end
- else
- instance = {t}
- end
- return setmetatable(instance, Set.mt)
-end
-
-function Set:add(e)
- self[e] = true
-end
-
-function Set:remove(e)
- self[e] = nil
-end
-
--- Union
-Set.mt.__add = function (a, b)
- local res = Set:new()
- if getmetatable(a) ~= Set.mt then a = Set:new(a) end
- if getmetatable(b) ~= Set.mt then b = Set:new(b) end
- for k in pairs(a) do res[k] = true end
- for k in pairs(b) do res[k] = true end
- return res
-end
-
--- Subtraction
-Set.mt.__sub = function (a, b)
- local res = Set:new()
- if getmetatable(a) ~= Set.mt then a = Set:new(a) end
- if getmetatable(b) ~= Set.mt then b = Set:new(b) end
- for k in pairs(a) do res[k] = true end
- for k in pairs(b) do res[k] = nil end
- return res
-end
-
--- Intersection
-Set.mt.__mul = function (a, b)
- local res = Set:new()
- if getmetatable(a) ~= Set.mt then a = Set:new(a) end
- if getmetatable(b) ~= Set.mt then b = Set:new(b) end
- for k in pairs(a) do
- res[k] = b[k]
- end
- return res
-end
-
--- String representation
-Set.mt.__tostring = function (set)
- local s = "{"
- local sep = ""
- for k in pairs(set) do
- s = s .. sep .. k
- sep = ", "
- end
- return s .. "}"
-end
-
-function Set:len()
- local num = 0
- for _ in pairs(self) do
- num = num + 1
- end
- return num
-end
-
-function Set:tolist()
- local res = {}
- for k in pairs(self) do
- table.insert(res, k)
- end
- return res
-end
-
-return Set
\ No newline at end of file
diff --git a/LICENSE b/doc/LICENSE
similarity index 100%
rename from LICENSE
rename to doc/LICENSE
diff --git a/doc/README.html b/doc/README.html
new file mode 100644
index 0000000..59f7df1
--- /dev/null
+++ b/doc/README.html
@@ -0,0 +1,14 @@
+
+
+
+ Htmlparser LuaRock Readme
+
+
+
+
+ You are being redirected to the homepage of the
+ Htmlparser LuaRock.
+
+ If you are not redirected after a few seconds, please click on the link above!
+
+
\ No newline at end of file