Bug - DOM lookup for 'id' was not supported

- Removed DOM caching, which appears to be a problem.
- Added 'id' and 'uuid' to DOM::get, which were missing, and therefore
  caused all filters with sequences to fail.
- Modified CmdInfo to load all tasks, until TDB2 is here.

src/commands/CmdInfo.cpp

@@ -58,7 +58,7 @@ int CmdInfo::execute (std::string& output)
   std::vector <Task> tasks;
   context.tdb.lock (context.config.getBoolean ("locking"));
   handleRecurrence ();
-  context.tdb.loadPending (tasks);
+  context.tdb.load (tasks);
   context.tdb.commit ();
   context.tdb.unlock ();