Extend CI tests with older c++ standards

Given that it is required for header only builds it has to be
installed too.

This informs travis that the container-based build environment can
not be used.

fix android build

Update project layout

Conflicts:
	posix.h

Based on that information less intrusive option defaults are choosen.
Additionally, packaging support is omitted.

Additional notes on how to improve the current state have been added.

This makes sure that the test does not break due to other reasons.