Code Reorganization

- Changed the ::measure and ::render methods from pure virtual to
  virtual.
- Fixed bug where recur.indicator used the length of the indicator
  instead of the indicator.
- Implemented ColString.{h,cpp} to support generic Views based on
  strings, not tasks.
- Implemented newly virtual Column:: methods.

src/columns/ColString.h

@@ -0,0 +1,50 @@
+////////////////////////////////////////////////////////////////////////////////
+// taskwarrior - a command line task list manager.
+//
+// Copyright 2006 - 2011, Paul Beckingham, Federico Hernandez.
+// All rights reserved.
+//
+// This program is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free Software
+// Foundation; either version 2 of the License, or (at your option) any later
+// version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+// details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program; if not, write to the
+//
+//     Free Software Foundation, Inc.,
+//     51 Franklin Street, Fifth Floor,
+//     Boston, MA
+//     02110-1301
+//     USA
+//
+////////////////////////////////////////////////////////////////////////////////
+#ifndef INCLUDED_COLSTRING
+#define INCLUDED_COLSTRING
+
+#include <vector>
+#include <string>
+#include <Column.h>
+#include <Color.h>
+#include <Task.h>
+
+class ColumnString : public Column
+{
+public:
+  ColumnString ();
+  ~ColumnString ();
+
+  void setReport (const std::string&);
+  void measure (const std::string&, int&, int&);
+  void render (std::vector <std::string>&, const std::string&, int, Color&);
+
+private:
+};
+
+#endif
+////////////////////////////////////////////////////////////////////////////////