Import image links for press that are embedded in content html
Added cache table creation to clean_db
Added safety check for missing cache database when clearing cache
Add pudb debug template filer
Moved adding context data for canada base list views to separate function, so that subclasses won't have as much inheritance confusion
Rename function arguments in artist views to match artist object instead of exhibition, holdover form copy & paste
Split author name in press into first and last fields
Don't add CANADA to title on artist resume
Removed old model_year_list, we now use flat list of models
Don't wrap flat page content below current exhibition in a <p>, because it is full HTML content
Print the year on the exhibition on the detail and list form
Only have press pages for press with content, else just link directly to PDF (fixed #128) also revised press listing (fixed #139)