built-in mkdir/rmdir
create built-in command: del,erase
rmdir: remove duplicate of wildcard expansion
built-in del: modify prompt and message
built-in mkdir/rmdir
create built-in command: del,erase
rmdir: remove duplicate of wildcard expansion
built-in del: modify prompt and message
Merge branch 'experimental' of https://github.com/zetamatta/nyagos into experimental
Merge branch 'experimental' of https://github.com/zetamatta/nyagos into experimental

Conflicts:
	commands/mkdir.go