Bug Fix - due date, colorization

- Fixed bug that caused colorization to be way, way off.  Silly
  mistake.
- Fixed bug whereby due dates and durations were stored as-is, but
  should have been converted.
- On a related note, added Date::toEpochString,
  Duration::operator (std::string).

src/Date.cpp

@@ -25,6 +25,7 @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 #include <iostream>
+#include <sstream>
 #include <time.h>
 #include <assert.h>
 #include <stdlib.h>
@@ -209,6 +210,14 @@ time_t Date::toEpoch ()
   return mT;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+std::string Date::toEpochString ()
+{
+  std::stringstream epoch;
+  epoch << mT;
+  return epoch.str ();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 void Date::toEpoch (time_t& epoch)
 {