Implements all of #1010.
Some fixes based on Hartmut's suggestions.
Renaming cfg constant
More GC description details
Merge remote-tracking branch 'remotes/origin/increment_merging' into fixing_987
Removed incref_apply
Fixing a couple of problems with incref merging
Improve error handling and performance of incref_async
Started to work on keeping track of incref requests
work in progress
More work on fixing 987. Code is complete now, needs some debugging still.
More work in progress, added handling of deferred decref requests
Removed HPX_USE_PORTABLE_ARCHIVES configuration constant
Adding proper handling of id splitting in the context of incref/decref requests
Fixed timed wait regression test
Fix #1028.
Fix typos in --help
Specify a description for the worker threads in HTTS.
Add missing hpx::start overloads.
Refactored future shared_state