Somewhere

* bug fix: "App Paths" lookup had been crippled in 0.7.0. Restore that.
* feature/module API change: Now print out (and return for the module interface) from where a match was found, e.g. "(from PATH element 3)". The module interfaces now returns (match, from-where) tuples.
* bug fix: --path argument was broken (-p shortform was fine)

* bug fix: Handle "App Paths" registered executable that does not exist.
* feature: Allow an alternate PATH to be specified via 'path' optional argument to which.which() and via -p|--path command line option.

* first public release