* pandoradb.sql: added in the table tgrupo the column 'propagrate' for to
use in the subgroups trees (new feature in comming for 3.2).
* extras/pandoradb_migrate_v3.1_to_v3.2.sql: added new migration SQL file to
migrate from 3.1 to 3.2.
* extras/pandoradb_migrate_v3.0_to_v3.1.sql: erase old file, only find into
repository the branch 3.1.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@3005 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f