README: there is no step 3
Merge pull request #43 from larsmans/readme-step3

README: there is no step 3
Merge branch 'master' of github.com:marcomaggi/vicare into devel
added argument validation clause for keyword objects
renamed (vicare keywords) to (vicare language-extensions keywords)
renamed (vicare syntactic-extensions) to (vicare language-extensions syntaxes)
renamed (vicare flonum-formatter) and (vicare flonum-parser) to (vicare numerics ---)
renamed (vicare cond-expand ---) to (vicare language-extensions cond-expand)
renamed (vicare bytevector-compounds ---) to (vicare containers bytevector-compounds ---)
renamed (vicare weak-hashtables) to (vicare containers weak-hashtables)
renamed (vicare custom-ports) to (vicare language-extensions custom-ports)
development of (vicare language-extensions amb)