Update database_ykarita.js

changed petLocationChart to create a map
Update layout.jade

Added some source files to generate a map
Update js_ykarita.js

changed the location chart to a map
Update README.txt

Added a description how the page structure maps to the server templates and pages (C. ii)
Update README.txt
Merge pull request #3 from ykarita/master

changed the location cart to a map