v1.2: Improve feedback from the switch and counter operations

This update improves the the logic in the counter operation, and adds feedback to the switch operation when none of the switches match the given cell value.

v1.1: Make error & warning messages more specific

This update increases the amount of useful information included in errors and warnings.

v1.0: APIv4 master merge

This release is just a rename from v0.6, to mark the API v4 version going into the master branch.

v0.6: Replace errors with warnings to improve robustness

Also includes added JSDoc for importPreset()

v0.5: Fix for new API structures

API v4 now returns 'minimal' structures meaning that columns / rows are only populated if they precede cells containing values. This should be accounted for in this version.

v0.4: Improve error messaging around the main updating code

Make updating code more robust

v0.3: add preset operations

Resolve minor typo

v0.2: add custom operation support

Add custom updater operations

v0.1: initial APIv4 version

Fix README in-page links