Merge pull request #114 from eile/master

Doxygen improvements
Fix a compilation error on clang
Merge pull request #116 from biddisco/master

Fix a compilation error on clang
Change CMAKE vars to better support build as a subproject'
Fix #include protection to use correct project name
Fix luncbox build dir which is compiled into apps
Update gitexternal to latest
Point gitextrnals to subproject branch
Point gitexternals to JB clone of CMake/common tools
Update GitExternal
Update GitExternal
Merge branch 'subproject' of https://github.com/biddisco/Lunchbox
CR #118