[fa] Update Chapter 1

Some minor modification on chapter 1.
Added some notes for better translation.
Updated README file.
Merge pull request #830 from mxamin/upstream

[fa] Update Chapter 1
Merge branch 'HEAD' of git@github.com:pepr/progit.git
[cs] synchronization with latest [en] finished...

- examples (code snippets) fully synchronized
- text sychronization based only on structure and recognized markup
- newly found (missing in cs) translated