Added SystemInfo and FileSystems to query system and file system information, respectively.

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

@@ -0,0 +1,9 @@
+package net.rubygrapefruit.platform;
+
+public interface SystemInfo extends NativeIntegration {
+    String getKernelName();
+
+    String getKernelVersion();
+
+    String getMachineArchitecture();
+}