git links

• reference doc
• cheat sheets
• simple
• github education
• Atlassian BitBucket tutorials 
• Specific topics
• git reset demistified
• github .gitignore collection
• globbing patterns
• tree of branches
• git log --graph --all --oneline --simplify-by-decoration
• Tools
•  Eclipse Egit user guide
• JetBrains browser add-on for web git repository