Fix Travis
PersistentMap fixes and test improvements
Logging improvements
Merge branch 'master' of https://github.com/eile/Lunchbox

Conflicts:
	tests/persistentMap.cpp
Merge branch 'master' of https://github.com/eile/Lunchbox

Conflicts:
	tests/persistentMap.cpp
Merge branch 'master' of https://github.com/Eyescale/Lunchbox
Fix some issues reported by clang-check
PersistentMap: be less strict about value types
Merge branch 'master' of https://github.com/eile/Lunchbox
Fix Travis
Merge pull request #128 from eile/master

PersistentMap fixes and test improvements