Added new operator handler

lib/SugarTrail/Template/Condition.pm

     return $a =~ m/$b/;
 }
 
+sub _in {
+    my $a = shift;
+    my %b = map { $_ => 1 } @_;
+    return exists $b{$a};
+}
+
 sub new {
     my $class   = shift;
     my $self    = {};