Enhancing nocache helper

* Adding support for DONOTCACHEOBJECT
* Adding support for DONOTCACHEDB
Merge pull request #4591 from alexbain/do-not-cache

Enhancing nocache helper
Ensure stock status is set for variations after setting to 0 Closes #4587
POMO updates
Unused assets
remove menu icons
remove wc_icon
remove woocommerce-icons
remove star.png and update star-rating to use new icon font
remove image_watermark
remove gear.png
image optimisation
remove mijireh assets
Revert "remove mijireh assets"

This reverts commit 7afb6e2af1054a21060dbcf3b728518d5e339af3.
tweaked mijireh getting started message
removed #wc_get_started
Validate the currency code sent back by paypal
Clean meta values in paypal gateway
Store POST to variable for paypal
2.1-rc-1 version number