Use relative_require, bump version to 0.3.0.
Added ACL example.
Added changes so far for 0.3.0.
Dropped XP support, use blocks and/or free memory pointers in elevated_security? method.
Added ace type constants.
Added a couple ace structs.
Remove sid argument to constructor.
The find_ace method now returns an ACE object.
Added the ace_type_string method.
Removed a couple accessors, updated docs.