Fixes to Series<T> class: (1) extendToIncludeRange, (2) prevent instance copy.
Bug Number: n/a
Release notes (y/n): no
For Release Nums: 7.1

An very basic coding error was discovered in the following method, in 
Sim/Series.cxx (a templated class):

  okstat Series<T>::extendToIncludeRange(
   const Date_Time* startOfRange,
   const Date_Time* endOfRange)

Instead of comparing Date_Time values, as intended, the _addresses_ of 
Date_Time instances were being compared.  Here is a screenshot of the code 
in the debugger (made in the course of diagnosing a suspected problem with 
this function):

http://cadswes2.colorado.edu/~philw/2017/SCT/SheetCols/SeriesBug/Series-extendToIncludeRange.png

In existing code, that dysfunctional method is used twice in the 
computeIncrementalLocalInflow_LocalInfo constructor, in file: 
EngrObjs/CompObj.DISAGG.cpp.

ALSO, in new development, it was discovered that it is _possible_ to copy 
Series<T> instances (i.e. by value).  The following code was added to the 
header file to cause compilation or link errors if such a thing is ever 
attempted:

  private:
    // Disallowed; Not Implemented.
    Series (const Series<T>&);                // copy constructor
    Series<T>& operator= (const Series<T>&);  // assignment operator

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