Merge branch 'v160' of https://github.com/drbyte/zc-v1-series into v160
Breadcrumb Rich Snippets Microdata

Using Google rich snippets tools
(http://www.google.com/webmasters/tools/richsnippets) and I found out
that the microdata format is not completely correct.

I think the changes I made fixed that issue.
Update breadcrumb.php

Added a newline
Update breadcrumb.php

Readability improvement
Merge branch 'v160' of https://github.com/drbyte/zc-v1-series into v160
Fix duplicate reported by lat9
(other file cleanups will occur when PR #121 is merged, after outstanding updates are completed to it)
Merge pull request #137 from drbyte/lang-file-duplicate

Fix duplicate reported by lat9
Update the concatenation style

Change the concatenation style as proposed by @zcwilt, @drbyte and @texdc.
Merge pull request #134 from IronLady/upstream

Breadcrumb Rich Snippets Microdata
Update travis.yml to fix submodule initialization
revert commit
Refactor breadcrumb class
Refactor links array and remove last link option

The option to render the last crumb as a link was functionally deprecated.  It can now be removed.
Apply PSR formatting
Remove reset method and add test
Update main page template
Update defined_page.php for secure images
Some servers returning references to an invalid index value if the SQL query returned is empty
Shipping module unable to register an error
Correct issues on Gift Certificate defines