Restructure files and libraries

Rename a bunch of files to make the consistent
	Create two new subdirectories for common code, and utilities

common/meson.build

@@ -0,0 +1,20 @@
+# Convenience library for the duplicated logging functionality
+common_sources = [
+    'common-logging.c',
+    'common-governors.c',
+    'common-external.c',
+    'common-helpers.c',
+    'common-gpu.c',
+]
+
+daemon_common = static_library(
+    'daemon-common',
+    sources: common_sources,
+    install: false,
+)
+
+link_daemon_common = declare_dependency(
+    link_with: daemon_common,
+)
+
+include_daemon_common = include_directories('.')