- Added Process.getPid() and Terminal.isTerminal().

- Added a test command-line app.

src/main/java/net/rubygrapefruit/platform/Process.java

@@ -0,0 +1,8 @@
+package net.rubygrapefruit.platform;
+
+/**
+ * Functions to query and modify a process' meta-data
+ */
+public interface Process extends NativeIntegration {
+    int getPid() throws NativeException;
+}