Template: breadcrumb - small fixes

- undefined variable on author page
- wrong html structure on hierarchical page
Template: breadcrumb - category structure

The html structure of multidimensional categories was wrong ($before &
$after was missing).
Display on blog (if not front page)

The breadcrumb should be displayed on the blog page, if it's not the
front page.
Set simplify user agent
Allow extensions to hijack i18n_product_type_alert
Added Nepali Currency and Symbol.
Tab index fix for PYG Currency and Symbol.
Added Lao Kip Currency
Added actions before and after all available downloads

For `my-downloads.php` template file
Simplfy typo
updated the .pot files
stopped deprecated warnings about like_escape() function since WP 4.0
options.include for makepot admin task

Added an `includes` option for the `makepot` task to specify which files should be scanned.
`grunt-wp-i18n` has now support for [options.include](https://github.com/blazersix/grunt-wp-i18n#optionsinclude)
Updated grunt-wp-i18n to 0.4.7 to support options.include
fixed the paypal process_refund() method
Merge pull request #1 from woothemes/master

Updated WooComerce
added sandbox support for paypal transaction url
Added paypal refund reason/note

cc @mikejolley
Merge pull request #6067 from axistools/NPR-Currency

Added Nepali(NPR) Currency and Symbol.
Merge pull request #6071 from axistools/makepot

options.include is now supported for makepot task