Merge pull request #1 from TheSerapher/next

Next
Update share.class.php
Update statistics.class.php
Update worker.class.php
Update findblock.php
Update mmcfe_ng_structure.sql
Merge pull request #2 from TheSerapher/next

Next
Merge pull request #3 from obigal/vardiff-test

Adding support for vardiff
Update mmcfe_ng_structure.sql
Update share.class.php
Update authenticated.tpl
Update default.tpl
Update smarty_globals.inc.php
Update pps_payout.php
Merge pull request #5 from obigal/vardiff-updates

Vardiff updates
Update share.class.php
Update for pushpool compatibility
Update for pushpool compatibility
Update for pushpool compatibility
Update pps_payout.php