Move a bunch of things around and flatten common crate

backend/common/src/lib.rs

@@ -1,9 +1,20 @@
-pub mod node;
+pub mod node_message;
 pub mod internal_messages;
-pub mod types;
-pub mod util;
-pub mod json;
-pub mod log_level;
-pub mod assign_id;
-pub mod most_seen;
-pub mod id_type;
+pub mod node_types;
+pub mod id_type;
+pub mod time;
+
+mod log_level;
+mod assign_id;
+mod most_seen;
+mod dense_map;
+mod mean_list;
+mod num_stats;
+
+// Export a bunch of common bits at the top level for ease of import:
+pub use assign_id::AssignId;
+pub use dense_map::DenseMap;
+pub use mean_list::MeanList;
+pub use num_stats::NumStats;
+pub use most_seen::MostSeen;
+pub use log_level::LogLevel;