add new translation for chapter 2
[vi] Update chapter 2
Transtlating Refspecs

Started the translation
Translated refspecs

Finita la traduzione e tradotto refspecs in italiano.
Updated

Translated pushing references
Translated remove refspecs
Translated "transfer protocols"
Translating "dumb protocol"
Translating "dumb protocol"

uncompleted
Update 01-chapter3.markdown

fix typo
Update 01-chapter3.markdown

[zh]fix typo: "--merge" -> "--merged"
Translated "dumb protocol"
Translated "smart protocol"
Translating "uploading data"
Merge pull request #597 from Nullizer/master

[zh]Update 01-chapter3.markdown
Merge pull request #596 from daftano/master

[it] update 01-chapter9.markdown
Translated "uploading data"
Translated downloading data
Translating "Maintenance and Recovery Data"
Translating