Fixed MySQL warning/error that was introduced in 1.7.10.1 and showing for some people who had "hide excerpts" enabled.
pmpro_search_filter now checking for filter_queries setting. (Need to add that setting now.)
changed to filterqueries (no _) and added upgradecheck code.
Merge branch 'dev' of https://github.com/strangerstudios/paid-memberships-pro