store keyword in cookie 'tracking202keyword'
urlencode cookies
modify database schema, bump version to 1.7.2.1

202_trackers.hide_query_string added for upcoming Hide Query String
feature
hide query string if instructed
set tracking202c1..c4 cookies when hiding query string

don't set tracking202keyword always, set it only when hiding query
string
don't get search query from referer when bidded keyword is needed
specify content type (javascript)
POST keyword, c1, c2, c3, c4 parameters to landing page

(when hide_query_string enabled)
add user controls for "hide query string" feature
show "hide query string" control only for landing page trackers