Copy current line when pressing enter anywhere in the buffer

Signed-off-by: Moritz Ulrich <ulrich.moritz@googlemail.com>
We definitely need more hooks. Add TODO.

Signed-off-by: Moritz Ulrich <ulrich.moritz@googlemail.com>
add package.el task

Signed-off-by: Moritz Ulrich <ulrich.moritz@googlemail.com>