r1978
added rule for /repl dir
Merge branch 'r1978' of https://github.com/magomimmo/domina into r1978
add cljs pathnames to leiningen source-paths and test-paths
add rule for .nrepl-port
add by-id and by-class egde cases unit tests
add blank? private function and fixed by-id and by-class bugs
fixed value fn to handle nil input, added nil and extend-protocol DomContent to nil and string types
add edge unit tests for nodes, single-node and value functions
update to 1978
removed failing standard cases