You can build lws without support for ws, with -DLWS_ROLE_WS=0.
This is thanks to the role ops isolating all the ws-specific business
in the ws role.
Also retire more test apps replaced by minmal-examples.
This replaces the old test-app for echo with separate client and server
minimal versions.
The autobahn test script is made more autonomous and tests both
client and server.
This adds an lws cmake option that builds all the minimal examples as part of lws,
it's useful for QA.
It adds a macro to examples that depend on a particular lws configuration to understand
they should just null out their project definition in builds where the lws configuration
requirement is not met, and we are building as part of lws.
It also adapts all the example library additions to select the just-built-but-not-yet-installed
library in the case it is built as part of lws. If built standalone, it now uses the cmake
platform-abstracted way to add the library requirement too.
