added a version of piston which uses lxc instead of docker, added tests for lxc

tests/test.c

@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+void main(void) {
+    printf("good\n");
+}

tests/test.cpp

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+#include <iostream>
+
+int main(void) {
+    printf("good\n");
+    return 1;
+}

tests/test.cs

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+using System;
+
+namespace HelloWorld {
+    class Hello {
+        static void Main() {
+            Console.WriteLine("good");
+        }
+    }
+}

tests/test.go

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+package main
+
+import "fmt"
+
+func main() {
+    fmt.Println("good")
+}

tests/test.java

@@ -0,0 +1,5 @@
+public class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("good");
+    }
+}

tests/test.js

@@ -0,0 +1 @@
+console.log('good')

tests/test.nasm

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+SECTION .DATA
+good:     db 'good',10
+txtlen:  equ $-good
+
+SECTION .TEXT
+GLOBAL _start
+
+_start:
+mov eax,4
+mov ebx,1
+mov ecx,good
+mov edx,txtlen
+int 80h
+mov eax,1
+mov ebx,0
+int 80h

tests/test.php

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+<?php
+
+echo 'good' . "\n";

tests/test.r

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+print('good')

tests/test.rb

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+puts 'good'

tests/test2.py

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+print 'good'

tests/test3.py

@@ -0,0 +1 @@
+print('good')

tests/test_all_lxc

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+#!/usr/bin/env bash
+
+echo 'testing c'
+../lxc/execute c test.c
+echo 'testing cpp'
+../lxc/execute cpp test.cpp
+echo 'testing cs'
+../lxc/execute cs test.cs
+echo 'testing go'
+../lxc/execute go test.go
+echo 'testing java'
+../lxc/execute java test.java
+echo 'testing asm'
+../lxc/execute asm test.nasm
+echo 'testing js'
+../lxc/execute js test.js
+echo 'testing php'
+../lxc/execute php test.php
+echo 'testing python2'
+../lxc/execute python2 test2.py
+echo 'testing python3'
+../lxc/execute python3 test3.py
+echo 'testing r'
+../lxc/execute r test.r
+echo 'testing ruby'
+../lxc/execute ruby test.rb