Argument Parsing

- Added proper handling for sequences, in that they must be contiguous.
- Added placeholder code for default command, and automatic info report.
- Eliminated Context::parse.
- Eliminated Context::run Timer, because when it goes out of scope, it
  adds timing messages to the deubg output, which at the end of Context::run
  has already been displayed.  In addition, the Context::dispatch timer
  is about 0.2 milliseconds shorter, so the two are redundant.

src/main.cpp

@@ -70,13 +70,13 @@ int main (int argc, const char** argv)
   catch (std::string& error)
   {
     std::cout << error << "\n";
-    return -1;
+    status = -1;
   }
 
   catch (...)
   {
     std::cerr << STRING_UNKNOWN_ERROR << "\n";
-    return -2;
+    status = -2;
   }
 
   return status;