OpenSHMEM 1.5 Errata

• Clarified that shmem_test_all and shmem_test_all_vector routines return 1 when the test set is empty (#442).
• Clarified that shmem_team_split_strided and shmem_team_split_2d return nonzero when the parent team is SHMEM_TEAM_INVALID (#461).
• Corrected the level argument's recommended value in API notes for shmem_pcontrol to indicate that the value should be greater than 2 to enable profiling with profile library defined effects and additional arguments (#480).
• Clarified that fence operations only guarantee ordering for operations that are performed on the same context (#496).
• Clarify that source and dest arrays must be the same across PEs in OpenSHMEM reductions (#490).