Upgrade little-snitch to 3.1.1
contributing.md: symlink to taps instead of home

The rest of the contribution instructions
have people working on the clone already in brew taps.

This just updates a reference that is still pointing
to the would-be contributors' home directory.
Merge pull request #1018 from billwanjohi/contributing_tweak

contributing.md: symlink to taps instead of home
bump version to 0.16.1

also pull version into a variable because i'm sick of typing it twice
every time
Merge pull request #1010 from gregstallings/little-snitch

Upgrade little-snitch to 3.1.1
sigh stupid typo
bumping version to v0.16.2

to release past the typo