Improve the lecture with the following:

  - Add images, make some transparent and reword some explanations

  - Add 3 slides about the branching workflow

  - Remove unneccessary '--' in commands
    The commands should be easier to digest without those, although it's good to have them.

  - Prefer explanations with files instead of pointers

  - Reorder commit slides.
    Show the commit file and tree themselves first.

  - Use 'staging area' instead of 'index'
    Using two terms may confuse people that are not familiar with them.
    Also the term 'staging area' better describes what it does.

  - Reword the explanations for the 4 file states
    This makes it a bit more formal, but I believe it should be easier
    to understand in the context of the previous slides.

  - Explain about the four file areas first
Improve punctuation and change some terms
Add example slides
Add more examples of commit descriptions
Merge pull request #67 from stormbreakerbg/15-git-improvements

Подобренията към лекцията за Git