update

Changelog

@@ -5,7 +5,8 @@ version 1.3.0 (not yet released)
    The default calendar is now None (the instance is not calendar-aware unless a valid
    calendar string is provided).  The previous default was 'standard', but the instances were
    not calendar-aware unless created directly by the various calendar-specific sub-class
-   constructors (issue #198).  
+   constructors (issue #198).   Much code moved from cython to python as part of this change,
+   so some performance degradation is expected.
 
 version 1.2.1 (release tag v1.2.1rel)
 =====================================

cftime/_cftime.py

@@ -1339,7 +1339,7 @@ def assert_valid_date(dt,is_leap,julian_gregorian_mixed,has_year_zero=False,
     if dt.microsecond < 0 or dt.microsecond > 999999:
         raise ValueError("invalid microsecond provided in {0!r}".format(dt))
 
-## beginning of block duplicated in _cftime_utils.pyx
+## beginning of block duplicated in cython code _cftime_utils.pyx
 ## if this block is commented out, and "from ._cftime_utils import" line up top
 ## is uncommented, there is a ~50% performance improvement.
 #
@@ -1784,7 +1784,7 @@ def assert_valid_date(dt,is_leap,julian_gregorian_mixed,has_year_zero=False,
 #
 #    return year,month,day,dow,doy
 #
-#### end of block duplicated in _cftime_utils.pyx
+#### end of block duplicated in cython code _cftime_utils.pyx
 
 def JulianDayFromDate(date, calendar='standard'):
     """JulianDayFromDate(date, calendar='standard')