Starting DB implementation.

Added Makefile, id_counter.erl, and yaws.conf.
Created ts_common module. Will contain common DB code. So far only list/3.
Created ts_timeline module. DB code for storing timeline entries.
Created ts_entry module, DB code for storing timelin entries.

src/ts_db_records.hrl

@@ -0,0 +1,12 @@
+-record(ts_timeline, {
+    ref,    % {username, timelineid}
+    created,% {{year, month, day}, {hour, minute, second}}
+    desc
+}).
+
+-record(ts_entry, {
+    ref,        % {username, timelineid, eventid}
+    timestamp,  % {{year, month, day}, {hour, minute, second}}
+    mark,       % String description of entry
+    notes       % String with further notes about the entry
+}).