Disable checkRecipients by default as it contradicts alwaysTrust

[dominikschulz]

If CheckRecipients is true AlwaysTrust doesn't matter anymore, since invalid recipients won't even be passed to gpg.

Also see #206
@frntn

[frntn]

I have successfully build, install & test this commit against my setup :

bash$ git remote add dominikschulz https://github.com/dominikschulz/gopass.git
bash$ git fetch dominikschulz
bash$ git checkout fix/checkrecp
bash$ make
bash$ sudo make install
bash$ /usr/bin/gopass edit team-devel/foo/bar
gopass: Encrypting /foo/bar for these recipients:
 - 0xAD01D1EDC256A009 - John Doe <john.doe@anon.com>
 - 0xD385289FA809234F - Matthieu Fronton <m@tthieu.fr>

Do you want to continue? [Y/n]: n

Thanks 👍