adding new workout locations and paragraph about jogging

Hi, this pull request has some suggestions for the workout page.  (I also changed the javascript entry for the googlemaps api to http:// so I could see it on my local machine).

Unfortunately I don't have a good picture editor - I have saved down the logos of the places I've added in the images folder, but don't have a good way of cropping them so they look better on the google maps image.

Also hope you like what I've written about running, tried to format it in the same way as the preceding and following sections...