initial stuff at mark day that has logs. atm it is slow and has some bugs I will fix soon. I commit this nonetheless

add scripts/migrate_logs_to_dot9_db.py to makefile so we distribute it in snaps and releases. thanks Jim++!

add ACE log_contact_status_changes and expose to UI in advanced tab in misc. this replaces the previous options and imo is good to expose to that place (used to have log-related stuff)

sec text should not be escaped for pango as it is put in pango formatting. apostrophe etc show ok now in file req window

log system rewrite to use sqlite database instead of plain ascii files. this allows us to scale better (be faster), provide search in history, and save logs for JIDs that are non-ASCII. PLEASE read http://trac.gajim.org/wiki/MigrateLogToDot9DB

commit logic of func; we were returning anyways. TC is oftenly touched, so I commit to avoid conflicts

add uniq; fix name of index to be cooler, fix a typo in comment, and most importantly use lastrowid instead of asking max (eg. play a little less with db