Add paragraph about .gitignore files.
Add paragraph about .gitignore files.

Ppanos40/liquid-galaxy.lg-root-fs,LiquidGalaxy/lg-root-fs,mazihan723/liquid-galaxy.lg-root-fs,Ppanos40/liquid-galaxy.lg-root-fs,Ppanos40/liquid-galaxy.lg-root-fs,LiquidGalaxy/lg-root-fs,oak11/liquid-galaxy.lg-root-fs,oak11/liquid-galaxy.lg-root-fs,mazihan723/liquid-galaxy.lg-root-fs,oak11/liquid-galaxy.lg-root-fs,LiquidGalaxy/lg-root-fs,oak11/liquid-galaxy.lg-root-fs,LiquidGalaxy/lg-root-fs,mazihan723/liquid-galaxy.lg-root-fs,Ppanos40/liquid-galaxy.lg-root-fs,mazihan723/liquid-galaxy.lg-root-fs