Issue #7: Adding debugging console and fixing the path search for package.json

This commit fixes the problem for finding the package.json from the installed
app that has guppy. In addition, a bug with the hook collector method was not
returning the unique list of hooks with the failure "filter method does not exist".

*   modified:   lib/hook-collector.js
- Resoling the path to the app's package.json differently
- Logging the path to the package.json for debugging purposes.
- Logging the list of all installed hooks.

*   modified:   scripts/install.js
- Logging the location of the hook script.