1. Adding other files to index
2. Some fixes to chapter 00, 01, 02, and 03
3. Partial translation of Chapter 04 (80%)
4. Partial translation of Chapter 15 (60%)
Merge pull request #2 from abutronik/web2py-pl-ab

1. Adding other files to index
Finalize translation of Chapter 04 (100%).
Merge pull request #4 from abutronik/web2py-pl-ab

Finalize translation of Chapter 04 (100%).
A few stylistic fixes and typos in Chapters 01 and 02
Merge pull request #6 from abutronik/web2py-pl-ab

A few stylistic fixes and typos in Chapters 01 and 02
Delete org.eclipse.core.resources.prefs
Delete org.eclipse.php.core.prefs
Delete .project
Delete .pydevproject
Merge pull request #203 from web2py-book-pl/master

The sequel to work on the Polish translation of the book