* [ADDED] Smarty acl_check function
* [ADDED] Optional default return value for getValue calls
* [UPDATE] ACL Checks in page controllers
* [UPDATE] Navigation template to use check_acl from Smarty
* [ADDED] New ACL options where needed
* [REMOVED] Disable pages from System Settings Tab
* [ADDED] Above removed pages into ACL Settings Tab
This will make usage of ACLs a bit easier and transparent.
Also fixes#1731 once merged.
Updated backend and theme to be able to deal with deleted accounts
* Backends will skip any users that have no account_id associated with
their shares
* Updated round stats theme to show users as unknown if none can be found
This will not fully address the issue of account deletion but at least
wont break the system anymore.
* Added new admin options: disable_navbar and disable_navbar_api
* Removes LIVE STATS from navigation list
* Removes live updates on Pool General Statistics page
* Added system load checks to getnavbardata API call
This will help to decrease load on high-volume servers at the cost of
losing live status.
Fixes#1014 once merged.
* [ADDED] Block over times stats to blocks stats page
* [CHANGED] Split default block stats page template up into subtemplates
* [IMPROVED] Single SQL Query for all Block Stats over Time
* [UPDATED] Templates for new SQL Data
* [ADDED] More error codes
* [MODIFIED] Class updates to use Base Class all the time
* [MODIFIED] Cronjobs have been slightly adjusted
* [ADDED] More base class features
* [FIX] Estimated shares on various places
* [ADDED] Calculate estimated shares based on network diff in stats
class
* [UPDATED] Themes updated as needed
Fixes#819 once merged
