highlight the existence of git 'tree' object type to distinguish it (e.g. from file system tree)
Extend/improve "Diffing Binary Files" section v2

v2:
  * grammar fixes
  * description of img2txt is dropped
Add "thanks:" to the ja section of latex/config.yml
[ru] chapter 2: Corrected typo "репозиторями"
[pl] translated first part of chapter 8
Modify "thanks:" at the ja section of latex/config.yml
[pl] translation of section 8.1
Updated readme with MacOS dependencies.
[pl] translation of section about importing from Subversion repository
[pl] translation of section about import from Perforce
[pl] translation of sections about importing from other SCMs and summary
Update 01-chapter9.markdown
[pl] translation improvements in chapter 8
[pl] translation of section 9.1 and guidelines update
[pl] translation for polish version of pdf in config.yml
[pl] spelling fixes in chapters 5 and 6
[pl] spelling fix in chapter 8
[pl] translation of section 9.2
Merge pull request #456 from valmaev/master

[ru] chapter 2: Corrected typo "репозиторями"
Merge pull request #457 from harupong/latex_config.yml

Add "thanks:" to ja section of latex/config.yml