Merged the preface parts

Author: nakov

.gitignore

@@ -20,12 +20,6 @@ _book
 !.vscode/tasks.json
 !.vscode/launch.json
 !.vscode/extensions.json
-/resources/Prepress-Scripts/Prepress-Book-in-MS-Word/obj
-/resources/Prepress-Scripts/Prepress-Book-in-MS-Word/.vs
-/resources/Prepress-Scripts/Prepress-Book-in-MS-Word/bin
-
-# PyCharm
-.idea/*
 
 # GitHub Pages deployment folder
 _gh-pages

SUMMARY.md

@@ -1,8 +1,5 @@
 * [Book "Programming Basics" with Java](README.md)
 * [Preface](chapter-00-preface.md)
-* [About SoftUni and SoftUni Judge](chapter-00.1-about-softuni.md)
-* [How to Become a Software Developer?](chapter-00.2-how-to-become-a-programmer.md)
-* [More About the Book](chapter-00.3-about-the-book.md)
 * [1. First Steps in Programming](chapter-01-first-steps-in-programming.md)
 * [2.1. Simple Calculations](chapter-02-simple-calculations.md)
 * [2.2. Simple Calculations – Exam Problems](chapter-02-simple-calculations-exam-problems.md)