[fa] Update Chapter 1

Some minor modification on chapter 1.
Added some notes for better translation.
Updated README file.
[cs] Synchronizing with [en] by structure and markup
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
[cs] ch.1 -- translation revision/comparison with new [en] finished
Merge pull request #831 from pepr/master

[cs] synchronization with latest [en] finished
[pt-br] Update chapter 3 git-branching

In line 53 'testing' is the name of branch
[it] reviewed chapter 1

Rewording for better understanding
Merge pull request #832 from kiide/master

[pt-br] Update chapter 3 git-branching
Merge pull request #834 from daftano/master

[it] reviewed chapter 1
Merge branch 'master' of https://github.com/progit/progit