Move code from portal_skins/custom into filesystem

[pbauer]

There are a couple of items in portal_skins/custom that need to be moves into the filesystem:

Overrides (replace with jbot-overrides)
backreferencewidget
referencebrowser
favicon.ico (moved to browser/resources)
logo.png (moved to browser/resources)
maintenance_icon.png (moved to browser/resources)
ploneCustom-dev.css
ploneCustom.css

Custom Code (move to BrowserViews)
detailed_view (done)
hasJSON (done)
len (belongs in hasJSON) (done)
shibboleth (done)
trusted_string

Obsolete
demo_method
fgvalidate_base
getServices
initialzeAccount
kss_generic_macros
manage_raiseRequest
migrateOffers

[raphael-ritz]

Update regarding "Custom Code" above:

• hasJSON (including len) and shibboleth have moved

[raphael-ritz]

favicon.ico, logo.png and maintenance_icon.png now moved to browser/resources

[raphael-ritz]

detailed_view is now a browser view