Some commits ago when adding the polinode board and switching to C++11 the...

Some commits ago when adding the polinode board and switching to C++11 the Makefile.inc was changed, but the MAKEFILE_VERSION was mistakenly not incremented, which caused issues using git out-of-tree projects. Incrementing version now, you should update your Makefile.inc if you are running a git out-of-tree (i.e. you are using submodules)