[feature/phpunit] Add phpunit configuration and bootstrapping.

phpunit.xml.dist

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit bootstrap="tests/bootstrap.php"
+         colors="true"
+>
+    <testsuites>
+        <testsuite name="phpseclib Test Suite">
+            <directory>./tests/</directory>
+        </testsuite>
+    </testsuites>
+
+    <!-- Code Coverage -->
+    <filter>
+        <whitelist>
+            <directory>./phpseclib/</directory>
+        </whitelist>
+    </filter>
+</phpunit>

tests/bootstrap.php

@@ -0,0 +1,13 @@
+<?php
+/**
+ * Bootstrapping File for phpseclib Test Suite
+ *
+ * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
+ */
+
+// Set up include path accordingly. This is especially required because some
+// class files of phpseclib require() other dependencies.
+set_include_path(implode(PATH_SEPARATOR, array(
+	dirname(__FILE__) . '/../phpseclib/',
+	get_include_path(),
+)));