Partial Translation

Translated 65% of all the strings.
Admin bar button translation
Removed concactenation, added formatted string

WordPress i18n states not to use concact string, but formatted string
instead. Also fixed indentation and i18n for the url in the admin bar,
since the one on the options page is internationalized as well.
Removed concatenation, added formatted string

In some language, the location of the link is different in such a
sentence. Translators can now just move the format replacement
identifier.
Added context translations and prep plural form

Contextual translations for all translations that can be different for
context in some languages. Translaters als so the context. Added plural
forms for preptime. Arabic for instance has 6.
Fix (!) for cooktime, added plural forms yields

Cooktime was using plural forms from preptimes. Replaced it alltogether
with plurar forms. Yields also have plural forms now.
Fixed indentention