* rm: various tweaks for clarity; add -v
changed some descriptions and tokens to make the meaning of each command clearer, and facilitate memorization of the flags
added the -v (verbose) option
* use a more intuitive pattern for the -i option
Fixes#310
Some files had no newlines, some had 1 newline and some more than 1 newline.
Normalize them all to have only 1 newline at the end of all files.