Added parenthesis

WP coding standard says to add always parenthesis
Update wc-deprecated-functions.php

Help IDE-s find and highlight the deprecated stuff. Good for WooCommerce plugin and theme developers
added $reason param in WC_Payment_Gateway::process_refund()
Lost password, lookup username first before email.
Customer use emails as usernames so need to lookup based on username first for instances where this apply.
Fix sorting indicator and add help text to parent. Fixes #5977
maximum ammount for coupon functionality added
Add before/after edit address form actions

Introduce woocommerce_before_edit_address_form' and
'woocommerce_after_edit_address_form' actions
Separate edit address forms for billing and shipping
changed WC_HTTPS::force_https_url filter priority
updated the reason default value
Fix broken Transifex link

The link on http://wordpress.org/plugins/woocommerce/ to the Transifex project is broken.

It should link to https://www.transifex.com/projects/p/woocommerce/.
Tweak get_children to look for empty transient
Merge pull request #5986 from SiR-DanieL/patch-5

Added parenthesis
Merge pull request #5988 from woothemes/feature-process-refund-reason

Add $reason param in WC_Payment_Gateway::process_refund()
Merge pull request #5999 from tamarazuk/master

Add before/after edit address form actions
Merge pull request #6008 from woothemes/fix-force-https

Changed WC_HTTPS::force_https_url filter priority
Merge pull request #6014 from om4james/patch-1

Fix broken Transifex link
Merge pull request #5987 from afurculita/patch-1

Update wc-deprecated-functions.php
Merge pull request #5989 from woothemes/lost-password-email-username

Lost password, lookup on username first before email.
Initial display of add order item buttons Fixes #5991

Also Closes #5994