Add Advanced Search capabilities from log

[bgajdero]

Create custom search access capabilities. Going beyond Google Analytics, looking at the server access logs, or what ever CKAN provides, to get raw access data.

Extend current search capabilities to include

• search queries used (capture keywords)
• who user is (to group search queries by user). username or single session is ok, if not logged in.
• timestamp

if logged in

• when logged in
• when logged of

if not logged in

• when session started
• when session ended

[bgajdero]

Will be relying on filter instead of access logs, replaced with #30