I am constantly forgetting that I can't use `ctrl-p` to open
`.travis.yml` or any other file with a leading `.`. This change comes
about after some discussion in general on how to handle this. Passing
`--hidden` to the `ag` command allows it to find files with a leading
`.`.
Unfortunately, this also includes the content of your `.git`
directory. To overcome this, we add `/.git/` to `agignore`.
https://github.com/ggreer/the_silver_searcher
* ag is faster than ack
* ag searches all files by default (but still ignores gitignored files). This
removes the need for ack's `--type-add=` options.
* The command is 33% shorter than ack!