- Added package architecture checking

- Added an installed package info updater system (can add new fields to installed packages like "architecture" and check for other errors
- Moved test packages under a x86_64 subfolder

test_packages/x86_64/hello/pkg.info

@@ -0,0 +1,5 @@
+name: hello
+description: A simple hello world program
+version: 1.0
+architecture: x86_64
+type: binary