- Added direct accessors to the dependeny CapSets in Resolvable.

- Added direct accessors to the dependeny CapSets in Resolvable.
  (i.e. Resolvable::provides(), Resolvable::requires(), etc.)

- Removed Resolvable::deps and Resolvable::setDeps.
  (a Resolvable::deprecatedSetDeps is kept untill solver/temorary is cleaned)

- Resolvable factories makeResolvable(And|From)Impl now take a reference to
  struct NVRAD (name,edition,arch,deps). The prefered way of creating resolvables
  now is filling a NVRAD, then constructing the object. NOTE: Manipulation of
  dependenciues after construction will be eliminated fron the Resolvables public
  interface.