Merge branch 'fix-send-for-variable-size-communicator-master' into 'master'
Do not assume that the complete message fits into tht buffer when sending in VariableSizeCommunicator
Closes #105 (closed)
See merge request !416 (merged)
(cherry picked from commit 407bb7c9)
b644237b Do not assume that a message cannot be split into multiple messages when sending. 91bb93d2 Use decrement operator