Fixes hasMany getAccessor when using an Array as only argument (specific properties)
Adds ChainFind .last() (similar to .first())
Adds tests for ChainFind .first() and .last()
Fixes hasMany acessor names to correctly convert prop_name to PropName (underscores)
Updates sql-query dependency to 0.0.12
Passes hasMany associations to ChainFind
Adds hasMany hasAcessor conditional to ChainFind (#94)