Fixed closing div element in admin footer.tpl

Closes #1394
Fixed closing p tag surrounding the powered by in catalog/view/theme/default/template/common/footer.tpl
Applied suggested patch for system/library/language.php to default to English and merge additional language.

REF: #1366
Additional standards improvements.
Updated spaces to tabs.
More space indent fixes.
a few fixes
Merge branch 'master' of https://github.com/opencart/opencart
Changed standards on build server.

Added weights to code sniffer finds.

Added more checks.

Updated more files to ensure tabs not spaces are used.
Merge branch 'master' of https://github.com/opencart/opencart into opencart/2.0-testing-suite