Sync the Norwegian and English book, r2004:2042.
* src/nb/LAST_UPDATED Updated by make sync.
* src/nb/book/appb.xml * src/nb/book/ch08.xml Merged r2017.
Book Spanish. Translated two paragraphs.
Book Spanish. Translated one paragraph.
* COMMITERS: Updated list of Spanish translators.
Book Spanish. Updated write access request process.
Book Spanish. Added unchecked translation term.
Book Spanish. Translated four paragraphs.
* src/nb/book/ch07.xml: Typo fix.
Book Spanish. Translated three paragraphs.
* www/index.ru.html Page is updated to correspond a current state of index.en.html (up to r2033)
