User show pages with entries

Users can post an entry to their log of sightings.  right now it's just a string.  they can post from their dashboard. they can also link to an entries index, to their profile, and to an entry show page.

You are fine to test this on heroku. Push any branch you want to master. It doesn't have to be merged in yet. Also, since you are using suspenders, it likely created heroku apps for you.