Fix multiple typos, punctuations, and 10 questions with wrong answers

Fix 6 questions with wrong answers along with several typos

Add 66 new questions, delete 6 duplicated questions, fix multiple que…

…stions, and spelling improvements.

Improve multiple questions, typos, and fix broken links

Improve 1 question & fix its wrong answer

Fix 1 wrong answer

Fix all remaining typos with support of automated proofreading software

First Release