Jaberwocky

• Fixed a mishandling of paths on Windows in check_corpus() that would trigger resetting the registry unintendendly and potentially falsely.
• To avoid a compiler warning (unused variable) issued by Rcpp solved by Rcpp v1.0.7, this version of Rcpp is now required (#22).
• In use_tmp_dir(), normalizePath() is applied on the tempdir() result to avoid confusion with symbolic links on macOS.
• New unit test for cwb_encode() (not yet run on Windows).
• A C-level inconsistency in cqp_get_registry() that would sometimes result in a wrong return value (i.e. registry path) has been fixed (#14).
• To avoid an unintended behavior of cwb_makeall(), an internal check is performed whether the corpus has been loaded already and whether the home directory of the loaded corpus and defined in the registry file are identical (#31).
• The link to the TXM project has been removed from the documentation to avoid the error 'SSL certificate problem: unable to get local issuer certificate' (#32).
• The cl_delete_corpus() function crashed when trying to delete a corpus that has not been loaded (#33). The function now aborts gracefully returning 0 when trying to delete a corpus that has not been loaded.
• A new function corpus_is_loaded() can be used to check whether a corpus is loaded.