Added description parameter to the woocommerce_form_field function

With this it is possible to add a short description below every
checkout billing and shipping input field.
Ability to add custom quantity using shortcode
Update class-wc-shortcodes.php
Update add-to-cart.php
removed unecessary localization from edit account fixes #5485
fixed the admin welcome screen css
Fixed my account setting values to wrong user submitted strings.
menu order terms were coming back empty fixes #5490
added egypptian currency

#5502
Add action hooks when saving tax rates

Resolves https://github.com/woothemes/woocommerce/issues/5505.

Add three actions when tax rates are saved:
* woocommerce_tax_rate_added
* woocommerce_tax_rate_updated
* woocommerce_tax_rate_deleted
Fix notice that occurs from external function call

Resolves https://github.com/woothemes/woocommerce/issues/5506.

This checks to see if the `integrations` array has any values before getting it's current value.
Merge pull request #1 from woothemes/master

Update
Update the address format for Taiwan
Addons page, reference new json API endpoint
Expire transient after a week
Clear sessions after ordering/on logout
Indentation
Stronger session ID generation
Merge pull request #5507 from lukecarbis/issue-5505

Add action hooks when saving tax rates
Merge pull request #1 from woothemes/master

Merge woothemes latest.