Update .editorconfig for TypeScript
Relace highlight.js with prism.js
Fix grunt watcher spwaning new processes

* Before this commit, the watcher spawned a new grunt processes
  and the old one was kept intact - this consumed a whole lot of
  memory.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Gruntfile.js
Merge branch 'master' of github.com:obarbeau/mdwiki
now c'est pb avec prism.js pour affichage du code...