[XFA] Multiple Countdowns - XF2 3.1.2

This version is only compatible with XenForo 2.2

Corrected bugs:

• Provided compatibility with xF2.2
• Recurring countdown title displayed on Manage countdowns page while there is not recurring countdown
• XF\Db\Exception: MySQL statement prepare error [1054]: Unknown column 'active' in 'field list' src/XF/Db/AbstractStatement.php:228
• Prefix checkbox incorrectly displayed on Manage countdowns page

Modifications:

• Hide Months when equal to 00
• Hide Days when equal to 00
• Moved Manage countdowns link to visitor menu instead of sidebar

Corrected bugs:

• XF\Db\Exception: MySQL statement prepare error [1054]: Unknown column 'active' in 'field list' in src/XF/Db/AbstractStatement.php at line 212

Corrected bugs:

• Truncated legend below countdown when description is small
• Countdown javascript file not minified

New features:

• Possibility to display a countdown in multiple locations
• Recurring countdowns

Modifications:

• Vendor javascript/css removed from the archive and added to our Core add-on