fix: make search out pipe-able

[amoeba]

This PR takes us from,

$ dbc search | wc -l
       0

to

$ dbc search | wc -l
      10

which means people can do more exciting and interesting things such as,

$ dbc search | awk '{print $2 }' | xargs -I {} dbc install {}

Also fixes a minor issue in the viewDrivers return value which makes commands like wc report the correct count.

[zeroshade]

Nice!