Fixing FindHPX.cmake to contain MPI libraries
Fix problem that caused the test to fail.

Added comment.
Tinkering with schedulers
Merge branch 'master' of github.com:STEllAR-GROUP/hpx
Fixing FindHPX.cmake to have the proper library paths set
Fixing typos, adding descriptions
Rolling back changes to thread_queue to keep measurements consistent
Fixed #803: Create proper serialization support functions for util::tuple
Fixed #804: Add stackless (non-suspendable) thread type
Fixing gcc compilation problems
More gcc fixes
Hopefully the last required fix to make it compile with gcc again
Adding stacksize as optional argument to executor interface
Adding option to run stackless threads
Fixing leftover problem introduced by solution for #803
Fixing a typo
Yet another typo fix
Minor improvements in thread queue
Fixing signed/unsigned integer comparison mismatch
Fixing problem introduced by adding stacksize parameter to executor interface