Add history search function

```
hi rake
.
.
.
 1341  rake build
 1374  rake build
 1418  rake test TEST=test/controllers/baton_integration_test.rb
 1429  rake test TEST=test/controllers/baton_integration_test.rb
 1431  rake test TEST=test/controllers/baton_integration_test.rb
 1437  bundle exec rake

* plus many more*
```

the `h` alias was already taken by `heroku`