Attribute laziness for Moose.

Hi,

In Moose you need to mark attributes as lazy that depend on other attributes for their defaults.

http://search.cpan.org/~ether/Moose-2.1204/lib/Moose/Manual/Attributes.pod#Laziness

Right now the ignore_words attribute is used by the tokenizer attribute, and since order of initialization isn't specified by Moose ignore_words was returning undefined, causing the constructor of Search::Tokenize to throw an error.

This pull requests add the proper laziness flags to the attributes.

Thanks,

Rusty