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.
Merge branch 'master' of git@github.com:opencart/opencart.git
Updated spaces to tabs.
More space indent fixes.
Merge branch 'master' of git@github.com:opencart/opencart.git