Began moving database communication into a client.

tests/client_test.rs

@@ -0,0 +1,14 @@
+use morethantext::MoreThanText;
+use std::collections::HashSet;
+
+#[test]
+fn are_session_ids_unique() {
+    let count = 10;
+    let mtt = MoreThanText::new();
+    let mut ids: HashSet<String> = HashSet::new();
+    for _ in 0..count {
+        let client = mtt.client();
+        ids.insert(client.session_id());
+    }
+    assert_eq!(ids.len(), count, "ids = {:?}", ids);
+}