[DISCONTINUED] Volume-Based Fee/Discount

Updated to v153.1

Release Notes:
- NOTE: Updating from previous versions will require you to redo some settings
- Added ability to enter HTML for the shipping method Heading and rate Titles
- Added ability to set tax classes individually for each rate
- Added ability to base order total comparisons on the taxed sub-total
- Added Select All / Unselect All links for each Order Criteria section
- Added ability to copy rates when creating new ones
- Added "Show Examples" button with examples of how to set up various rates
- Added ability to auto-convert values from a non-default currency
- Fixed rare precision error with bracket comparisons
- Updated how multi-currency rates are entered, to be easier to use
- Updated admin panel interface
- Updated instructions.txt
- Updated license.txt
- Verified compatibility with 1.5.3.x

Updated to v153.2

Release Notes:
- Fixed "undefined index" error for country_id, zone_id, and postcode

Updated to v154.1

Release Notes:
- Updated instructions.txt with a note about fixing max_input_vars issues
- Verified compatibility with 1.5.4.x

Updated to v155.1

Release Notes:
- Added: ability to round final costs to a nearest value (e.g. nearest dollar)
- Added: ability to use the pre-discounted sub-total as the total value
- Updated: instructions.txt
- Verified: compatibility with 1.5.5.x

Updated to v200.1

Release Notes:
- Combined "Weight-Based Fee/Discount" and "Volume-Based Fee/Discount" into a single extension, due to overlap between their functionality.
- Added: compatibility with OpenCart 2.0.0.x
- NOTE: This version is a complete redesign, to utilize a new "rules" system. The functionality is essentially the same, so updating is not required at this point. If you do decide to update from a previous version, this version will appear as a new extension in Extensions > Order Totals, and you'll need to recreate your charge setup within the new version.