Reviewing "Git Basics"
[it] reviewed "Git Basics"
[it] Reviewed "Installing Git"
Reviewed "First-Time Git Setup"
[it] fully reviewed chapter 1
Update 01-chapter3.markdown

Replace `Revert` with `Switch` to avoid triggering an incorrect association with git-revert.
Merge pull request #667 from daftano/master

[it] update chapter 1
Merge pull request #669 from anaran/master

Update 01-chapter3.markdown