Change -t to -n, --dry-run

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
update README, too

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
rename this

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Merge branch 'master' into change-argument-name
Undo changing wrong argument.
Merge pull request #6 from getnikola/change-argument-name

[tags] change -t argument name to -n, --dry-run