v0.19.2

MPI v0.19.2

Diff since v0.19.1

Closed issues:

• Support the MPI Group interface (#277)
• Default and/or keyword args (#423)
• Don't redefine MPI_UNDEFINED to 0 (#499)
• Deadlock with MPI.jl + OpenMPI on a cluster (#517)
• MPI.jl + PackageCompiler (#518)

Merged pull requests:

• Add methods for keyword integer arguments (#510) (@simonbyrne)
• add citation (#516) (@simonbyrne)
• Various fixes to documentation (#520) (@giordano)
• Add group functions (v2.0) (#521) (@carlocastoldi)