Allow unnamed collection of paths

Paths will be named by replacing / with _
Documented ability to not name paths
Merge pull request #14 from timabell/unnamed-paths

Seems like a good feature, merging.  Thanks for the PR
Put the summary data file in the shots/ folder

To keep all the output together.
Updated readme to reflect new data.txt path
Merge pull request #15 from timabell/move-data-file

Put the summary data file in the shots/ folder
Update README.md

Added basic changelog by running git log | grep 'Merge pull'
Merge pull request #18 from ecometrica/gallery

Gallery
Changed wraith to login to web-site before taking snaps.