Optimized put with signal implementation as shmemx routines#815

Merged

wrrobin merged 11 commits intoSandia-OpenSHMEM:masterfrom wrrobin:pr/optimized-put-signal

Jan 7, 2019

+209-12

Commits on Dec 4, 2018

Added empty transport layer functions for put-signal
wrrobin
committed

Commits on Dec 20, 2018

Incorporating Jim's suggestions; Reverted the blocking API, Removed completion argument
wrrobin
committed
Used fi_atomicmsg for signal transfer to keep single copy atomicity
wrrobin
committed

Commits on Jan 2, 2019

Modified xpmem and cma put for signal
wrrobin
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Commits on Jan 3, 2019

Added memory fence between XPMEM and CMA puts
wrrobin
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Commits on Jan 4, 2019

Included header file shmem_atomic.h for memory fence
wrrobin
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Commits on Jan 7, 2019

Added comments suggested by Jim; Added missing inject flag for buffered send
wrrobin
committed