* A lot of new checks are added to WishboneCheckerE unit
  trying to implement the rules of the Wishbone spec.
* An illegal use of the suffix implication instead of logical
  implicationis fixed in WishboneMasterE unit

* Add 1st initial version of WishBone checker unit
* Add Wishbone package with component & type declarations
* Replace WB slave register by dictionary

WB_WRITE & WB_READ check that a write/read transfer is started on the
WishBone bus if requested on the local port of the WishBoneMasterE unit
at the adequate time.

The second logical implication was made the whole property holding
when the part after the 1st implication didn't hold. So, the 2nd
implication is replaced by an and in combination with the next
operator. Now the property fails when one of the two and'ed parts after
the implication fails.

Various new PSL assertions to check ports during Wishbone write & read
transfer and reset state