Added *fn-no-inherit-p* to specify the value of the slots are to be ignored and to start searching for values in the following prototypes
Add reset-slots function - clear hash with slots and set prototype to NIL. Bugfix: now no error if prototype of object = NIL
- encapsulate utils into mop-utils.lisp
 - *fn-no-inherit-p* remove.Instead global change of :prototype system, please using of prototype-object-ext
 - added prototype-object-ext and fn-no-inherit method for customization it (to setting function for skipped slots, see test.lisp)
 - package definition moved to package.lisp
 - change skip-slots-test to tested prototype-object-ext