Small Update to ReadMe

[soulFood5632]

What does this add?

In a recent #716, I made changes to to the root READMe.md, but I did not make adjustments to the one presented as part of the railtracks package. This change adds those links. It also removes an image which could not exist within the package.

Type of changes

Please check the type of change your PR introduces:

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update (improvements or corrections to documentation)
• 🎨 Code style/formatting (changes that do not affect the meaning of the code)
• ♻️ Refactoring (code change that neither fixes a bug nor adds a feature)
• ⚡ Performance improvement (code change that improves performance)
• ✅ Test update (adding missing tests or correcting existing tests)
• 🔧 Build/CI changes (changes to build process or continuous integration)
• 🗑️ Chore (other changes that don't modify src or test files)