added script show_table_sizes.php to show data, index, free space used i...

...n all tables, changed regex for predb matching, now matches all but ~465k predb titles

added predb.tpl change posted by mordor, fixed bug in change_USP_provider.php
added full text search to site search, works only if you have these indexes - ix_releases_searchname_ft and/or ix_releases_name_ft
if you search on releases.name - ix_releases_name_ft is required
if you search on releases.searchname - ix_releases_searchname_ft is required
as posted in the forum, ^& do not work with this search