Commands - add, log

- Made code more consistent between the two commands.

src/commands/CmdAdd.cpp

@@ -57,7 +57,7 @@ int CmdAdd::execute (std::string& output)
   std::vector <Task> all;
   context.tdb.loadPending (all);
 
-  // Every new task needs a UUID.
+  // Every task needs a UUID.
   Task task;
   task.set ("uuid", uuid ());
 

src/commands/CmdLog.cpp

@@ -27,7 +27,6 @@
 
 #define L10N                                           // Localization complete.
 
-#include <sstream>
 #include <Context.h>
 #include <text.h>
 #include <i18n.h>