Merge pull request #370 from linas/master

Remove ASRequest from the atomspace.
Merge pull request #371 from linas/master

benchmark: fix build break
Merge pull request #372 from linas/master

atomspace: remove AtomSpaceAsync
Merge pull request #373 from linas/master

miscellaneous atomspace cleanups
Merge pull request #374 from linas/master

fix build break
move to using a per-atom lock
atomspace: misc minor cleanup
atomspace: remove ancient cruft
Make atoms actually store their own incoming links
move incoming set to the atom
move the atom merge routine out of the atom table
atom table: add some minor notes
atomspace: restore incoming index to old version