corrected null-safe.ecf
better use a root class
new integration ecf file that includes most of the library .ecf of EWF
(note to include non library ecf, the related ecf should have a library_target)
Updated all-safe.ecf
(add all-stable-safe.ecf that includes only the library, examples and specific draft lib)
added wsf_html for (un)installation
delete ecf
now all-safe.ecf compiles again