Code Cleanup

- Renamed files task.h -> main.h, task.cpp -> main.cpp.  This is to
  prepare for the next rename, which addresses the OpenBSD bug.
- Removed utf8.h, utf8.cpp from Makefile.am, which were inadvertantly
  added.

src/main.h

@@ -0,0 +1,160 @@
+////////////////////////////////////////////////////////////////////////////////
+// task - a command line task list manager.
+//
+// Copyright 2006 - 2009, Paul Beckingham.
+// 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
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include <string>
+#include <vector>
+#include <map>
+#include <sys/types.h>
+#include "Context.h"
+#include "T.h"
+#include "TDB.h"
+#include "Table.h"
+#include "Date.h"
+#include "color.h"
+#include "../auto.h"
+
+// parse.cpp
+void parse (std::vector <std::string>&, std::string&, T&);
+bool validPriority (const std::string&);
+bool validDate (std::string&);
+bool validDuration (std::string&);
+bool validDescription (const std::string&);
+bool validCommand (std::string&);
+void loadCustomReports ();
+bool isCustomReport (const std::string&);
+void allCustomReports (std::vector <std::string>&);
+
+// task.cpp
+void gatherNextTasks (const TDB&, T&, std::vector <T>&, std::vector <int>&);
+void onChangeCallback ();
+std::string runTaskCommand (int, char**, TDB&, bool gc = true, bool shadow = true);
+std::string runTaskCommand (std::vector <std::string>&, TDB&, bool gc = false, bool shadow = false);
+std::string shortUsage ();
+std::string longUsage ();
+
+// recur.cpp
+void handleRecurrence ();
+Date getNextRecurrence (Date&, std::string&);
+bool generateDueDates (T&, std::vector <Date>&);
+void updateRecurrenceMask (TDB&, std::vector <T>&, T&);
+int getDueState (const std::string&);
+void nag (TDB&, T&);
+
+// command.cpp
+std::string handleAdd ();
+std::string handleAppend ();
+std::string handleExport ();
+std::string handleDone ();
+std::string handleModify ();
+std::string handleProjects ();
+std::string handleTags ();
+std::string handleUndelete ();
+std::string handleVersion ();
+std::string handleDelete ();
+std::string handleStart ();
+std::string handleStop ();
+std::string handleUndo ();
+std::string handleColor ();
+std::string handleAnnotate ();
+std::string handleDuplicate ();
+int deltaAppend (T&, T&);
+int deltaDescription (T&, T&);
+int deltaTags (T&, T&);
+int deltaAttributes (T&, T&);
+int deltaSubstitutions (T&, T&);
+
+// edit.cpp
+std::string handleEdit ();
+
+// report.cpp
+void filterSequence (std::vector<T>&, T&);
+void filter (std::vector<T>&, T&);
+std::string handleInfo ();
+std::string handleCompleted ();
+std::string handleReportSummary ();
+std::string handleReportNext ();
+std::string handleReportHistory ();
+std::string handleReportGHistory ();
+std::string handleReportCalendar ();
+std::string handleReportActive ();
+std::string handleReportOverdue ();
+std::string handleReportStats ();
+std::string handleReportTimesheet ();
+
+std::string handleCustomReport (const std::string&);
+void validReportColumns (const std::vector <std::string>&);
+void validSortColumns (const std::vector <std::string>&, const std::vector <std::string>&);
+
+// rules.cpp
+void initializeColorRules ();
+void autoColorize (T&, Text::color&, Text::color&);
+
+// import.cpp
+std::string handleImport ();
+
+// list template
+///////////////////////////////////////////////////////////////////////////////
+template <class T> void listDiff (
+  const T& left, const T& right, T& leftOnly, T& rightOnly)
+{
+  leftOnly.clear ();
+  rightOnly.clear ();
+
+  for (unsigned int l = 0; l < left.size (); ++l)
+  {
+    bool found = false;
+    for (unsigned int r = 0; r < right.size (); ++r)
+    {
+      if (left[l] == right[r])
+      {
+        found = true;
+        break;
+      }
+    }
+
+    if (!found)
+      leftOnly.push_back (left[l]);
+  }
+
+  for (unsigned int r = 0; r < right.size (); ++r)
+  {
+    bool found = false;
+    for (unsigned int l = 0; l < left.size (); ++l)
+    {
+      if (left[l] == right[r])
+      {
+        found = true;
+        break;
+      }
+    }
+
+    if (!found)
+      rightOnly.push_back (right[r]);
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////