Expand uninstalled taxonomies to include custom taxonomies.
Delete taxonomies
Delete taxonomies & terms
Adds special case for download limit so it can accept zero or blank

Signed-off-by: Paul de Wouters <paul@hmn.md>
Allow blank value for global setting and 0 for unlimited

Signed-off-by: Paul de Wouters <paul@hmn.md>
Unneeded statement

Signed-off-by: Paul de Wouters <paul@hmn.md>
Add filter to ajax discount code

This allows for plugins to create discount "aliases", thus preventing the need to create tons of different discount posts.

Example use case:

A user enters their existing license key. A plugin could validate the license key and, if successful, replace it with the (existing) "RENEW" discount code.
Filter the $return array after it's been processed
Update ajax-functions.php
Prepend results instead of appending them. #2134
Use direct DB query instead of get_Posts(). #2134
Fix extra slash in PayPal IPN URL. Closes #2135
Formatting of paypal-standard.php
Renamed filter to `edd_ajax_discount_response`
Fix formatting of process-purchase.php
Add email validation to logged-in user purchases. Closes #2138
Serbian (RS) zip codes only contain 5 digits
Merge pull request #2139 from mgibbs189/patch-1

Serbian (RS) zip codes only contain 5 digits
Add NZD
Merge pull request #2142 from sumobi/currency

Add NZD