Update LSI#remove_item such that they will work with the @items hash.

https://github.com/cardmagic/classifier/pull/15
only perform first order transform if total UNIQUE words is greater than 1

https://github.com/cardmagic/classifier/pull/19
Merge pull request #2 from jekyll/cardmagic/classifier/pull/15
Update history to reflect merge of #2 [ci skip]
Merge pull request #3 from jekyll/cardmagic/classifier/pull/19
Update history to reflect merge of #3 [ci skip]
Begin to remove core extensions in hope of using modules.
Exclude Gemfile.lock in .gitignore
Replace usage of monkey patches with modules
Merge pull request #7 from alfredxing/exclude-gemfile-lock
Update history to reflect merge of #7 [ci skip]
Merge pull request #9 from alfredxing/remove-core-exts

Replace usage of monkey patches with modules
Remove String and Hash core extensions
Merge branch 'remove-core-exts' of github.com:jekyll/classifier-reborn into remove-core-exts

* 'remove-core-exts' of github.com:jekyll/classifier-reborn:
  Replace usage of monkey patches with modules

Conflicts:
	lib/classifier-reborn/bayes.rb
	lib/classifier-reborn/lsi.rb
Wrongly replaced calling of ContentNode.word_hash

Signed-off-by: Parker Moore <email@byparker.com>
Merge pull request #6 from jekyll/remove-core-exts

Begin to remove core extensions in hope of using modules.
cache total word counts per category

https://github.com/cardmagic/classifier/pull/8