...to special member function declarations that were left undefined.  Helps
compilers do a better job at identifiying unused class members.  This plugin
uses heuristics and whitelists do identify applicable declarations, but is not
appropriate for "unattended" use so is placed into store/.

The following commits contain the results of running this plugin, per module:

* Declarations of undefined special member functions are mmarked
  SAL_DELETED_FUNCTION (aka "= delete", which is deemed superior to deriving the
  class from boost::noncopyable, cf. Howard Hinnant's reply to
  <http://stackoverflow.com/questions/7823990/what-are-the-advantages-of-boostnoncopyable>.

* Any redundant "explicit" or SAL_DLLPRIVATE markers are removed from the
  deleted definitions.

* Some redundant declarations of undefined default ctors are simply removed;
  smelled like clueless cargo-cult to have them declared at all.

* Some declarations of undefined operator == etc. are left in (and marked
  SAL_DELETED_FUNCTION) for now, to be on the safe side, though they are likely
  clueless cargo-cult, too.

* Most "static-only" classes are replaced with namespaces (and some where that
  would be non-trivial due to private members are marked TODO for later).

* Newly identified unused class members are removed.

Change-Id: Ibeaae4fd579d7a0971a2c2a654a2263acd13414a