Added docs for X::Temporal::InvalidFormat

doc/Type/X/Temporal/InvalidFormat.pod

@@ -0,0 +1,28 @@
+=begin pod
+
+=TITLE class X::Temporal::InvalidFormat
+
+=SUBTITLE Error due to using an invalid format when creating a DateTime or Date
+
+    class X::Temporal::InvalidFormat does X::Temporal is Exception { }
+
+This exception is thrown when code tries to create a C<DateTime> or C<Date> object
+using an invalid format.
+
+    my $dt = Date.new("12/25/2015"); # 'invalid Date string '12/25/2015'; use yyyy-mm-dd instead'
+
+=head1 Methods
+
+=head2 method invalid-str
+
+Returns the invalid format string (C<12/25/2015> in the example above)
+
+=head2 method target
+
+Returns the target type (C<Date> in the example above)
+
+=head2 method format
+
+Returns valid format strings for the target type in question, (C<yyyy-mm-dd> in the example above)
+
+=end pod