Why?
====
Frequency of a tool's usage is determined by how easy it is to use the
tool. By having to pipe in ctags files all the time, and not provide any
guidance to the user, this program is merely a toy, since it's hard to
get right, and harder to explore.
This modifies the default behavior to look for a ctags file in a few
common locations, and lets the user choose a custom location if she so
chooses.
Resolves#35
Why?
====
By default, people want to see an actionable, comprehensive list without
having to pass any flags into the program.
Previously, to see everything with high likelihood you'd need to provide
`-a --likelihood high`. This commit changes the program so that's the default.
It also introduces a `--all-likelihoods` flag (shorthand is `-a`) to see
everything, so if you want to opt into see it, you can. Finally, this
changes `-a` (to see everything) to `-s` (to see only single
occurrences, which was the previous default).
