Document that ESMF does *not* handle leap seconds

Resolves esmf-org#346

Author: billsacks

src/Infrastructure/TimeMgr/doc/Calendar_coptions.tex

@@ -30,6 +30,7 @@ \subsubsection{ESMC\_CALKIND}
 fourth year is a leap year in which February has 29 and not 28 days;
 however, years divisible by 100 are not leap years unless they are also 
 divisible  by 400.  As in the Julian calendar, days begin at midnight.
+(ESMF does {\it not} handle leap seconds.)
 
 \item [ESMC\_CALKIND\_JULIAN]
 {\it Valid range: 3/1/4713 BC to 4/24/292,271,018,333 } 

src/Infrastructure/TimeMgr/doc/Calendar_options.tex

@@ -33,6 +33,7 @@ \subsubsection{ESMF\_CALKIND}
 fourth year is a leap year in which February has 29 and not 28 days;
 however, years divisible by 100 are not leap years unless they are also 
 divisible  by 400.  As in the Julian calendar, days begin at midnight.
+(ESMF does {\it not} handle leap seconds.)
 
 \item [ESMF\_CALKIND\_JULIAN]
 {\it Valid range: 3/1/4713 BC to 4/24/292,271,018,333 }