Minor typo
Fixing last part of #721: Make HPX usable for Xeon Phi

 - reliably fix Intel compiler support, this includes pushing Boost changes upstream
Adding closed tickets to doc
Simplifying allocator detection. Error if selected allocator could not be detected
Allocator fine tuning
Fixing #842: Remove buffer_pool from MPI parcelport
Simplify tuple.

See #838

Signed-off-by: K-ballo <k@fusionfenix.com>
Added tuple tests.

See #837

Signed-off-by: K-ballo <k@fusionfenix.com>