Merge pull request #162 from szTheory/master

remove arity == 0 check so that chained scopes aren't cached
Merge pull request #163 from szTheory/master

bump to 2.5.13
Merge pull request #164 from szTheory/master

For *_equals_any conditions, cast single values to an array, ex: 5 to [5] or 'ben' to ['ben']
bump to 2.5.14
merge or conditions creates optional joins
remove gem file
2.5.15
udpate
wrap named_scope options in a lambda so that conditions such as Dates/Times don't cache for chained named scopes