Auto-bundle `cucumber`
Restructures wipit into wipspec and wipcuke

Options weren't being passed in to rspec.  But, it also doesn't make a
whole lot of sense to pass the same options to both commands.  So, allow
running wip specs and cukes separately, via wipspec and wipcuke,
respectively.
Moves git log into run-tests() from cuke()

Output is only useful when running the full suite and letting it sit in
the background (via `run-tests`).  Running `cuke` repeatedly, it's just
distracting.
Adds zrails() = zeus(-if-running) rails
ack-app = ack, but y'know, for the gems you use

Details: dumps the extant directories from your Rails app's
`$LOAD_PATH`, using `zeus` if applicable, then `ack`s over them
Adds `zrake` = zeus(-if-running) rake
Fixes `.env` bugs with .env file handling

1. Files weren't being checked to see that they looked like `.env` files
(added `looks-like-env` function).

2. Default file was being added outside the loop, so was being passed as
a literal arg (moved into loop).