Functions retrieving statistics now use Stats.subs.php

Signed-off-by: emanuele <emanuele45@gmail.com>
ssi_queryMembers uses retrieveMemberData from Members.subs.php

Signed-off-by: emanuele <emanuele45@gmail.com>
To squash in stats

Signed-off-by: emanuele <emanuele45@gmail.com>
Use a login form more close to the default one

Signed-off-by: emanuele <emanuele45@gmail.com>
ssi_boardNews uses messageIndexTopics

Signed-off-by: emanuele <emanuele45@gmail.com>
ssi_recentEvents uses getEventRange from Calendar.subs.php

Signed-off-by: emanuele <emanuele45@gmail.com>
ssi_checkPassword retrieves the user data with loadExistingMember from Auth.subs.php

Signed-off-by: emanuele <emanuele45@gmail.com>
Merge pull request #823 from emanuele45/SSI

SSI