Initial work on lazy default values
Fix gemspec
Merge branch 'master' into lazy-defaults
Restore expanding defaults prior freezing an object
Minor formatting fix
Add specs for LazyAccessor
Add spec for building a lazy accessor
Include Adamantium in Attribute, Accessor and AccessorMethod classes
DRY up ModuleExtensions#extended
Adjust flay threshold
Simplify setting default values and mass-assignment
Move private instance methods from InstanceMethods to AttributeSet
Set InstanceMethods#to_hash as an alias
Fix docs