Minor fixes for Windows build

general: fix to build with OMNeT++ 5.5

generic: fix to build with both OMNeT++ 5.3 (or later, including 6.0pre)

INET20111118 snapshot ported to OMNeT++ 5.4 (to help porting old models)

build: fix missing pdf documentation + removed unnecessary files

RadioVisualizer: typo

test/fingerprint: Updated showcases.csv (don't expect ERROR now)

build: fixed erroneous exclusion of some folders.

doc: version bump + tagged changelogs + minor doc fixes

build: removed turtorial and showcase web data