Commands

- Implemented stubbed Context::initialize2.
- Implemented combined command line.
- Migrated some code from Context::initialize to ::initialize2.
- Integrated ::initialize2 into the startup sequence.
- Implemented Context::dispatch2.
- Integrated ::dispatch2 into the run sequence.
- Implemented Context::updateXtermTitle.
- Added debug messages to new Command objects.
- Implemented CmdLogo, which implements the _logo command, for fun.
- Removed unnecessary base class overrides from Cmd* objects.

src/commands/Command.h

@@ -42,7 +42,7 @@ public:
 
   virtual bool read_only () const;
   virtual bool implements (const std::string&) const = 0;
-  virtual std::string execute (const std::string&) = 0;
+  virtual int execute (const std::string&, std::string&) = 0;
 
 private:
 };