first section of chapter2 has been translated
finish the translation of the second section of chapter2
the third section of chapter2 translated
replace some words, and fix some wrong translations
the section of chapter2, infix operation patterns, has been translated.
stream extractor section translated
using extractor translated
finish translating chapter 2
update readme file
fix some header and move out of term translations table
update readme file

add anchors to translated part
update readme file

add wiki link