add README and LICENSE

Author: poga

LICENSE

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+Copyright (c) 2018 Chieh Po
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

README.md

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+# Actix-Lua
+
+[Actix](https://github.com/actix/actix) actor with [Lua](https://www.lua.org/).
+
+## Features
+
+* Handling messages with Lua
+* Dynamic message type
+
+## Usage
+
+Add `actix-lua` to your `Cargo.toml`:
+
+```toml
+[dependencies]
+actix-lua = "0.1"
+```
+
+#### Implement an Actor
+
+You can define an actor with Lua, for example:
+
+```rust
+extern crate actix_lua;
+use actix_lua::{LuaActor, LuaMessage};
+
+fn main () {
+  let system = System::new("test");
+  let addr = LuaActor::new(r#"
+    function handle(msg)
+      return msg + 42
+    end
+  "#).unwrap().start();
+
+  let res = add.send(LuaMessage:from(123));
+}
+```
+
+## Message Type
+
+`LuaActor` only accept messages with type `LuaMessage`. The result of `LuaMessage` is also `LuaMessage`.
+
+`LuaMessage` is defined as:
+
+```rust
+pub enum LuaMessage {
+    String(String),
+    Integer(i64),
+    Number(f64),
+    Boolean(bool),
+    Nil,
+}
+```
+
+It's the sender's job to check the returned value type from Lua is what they want.
+
+## License
+
+The MIT License