What is velserver?

I decided to rewrite the documentation in a google drive documents untill I find a better place:

Velserver Information: https://docs.google.com/document/d/e/2PACX-1vSMcBHwNPwVBqv_ixkNafg1LjtWRsFbnmI4XzVx7Z3NruSXQec2IQ17fnl4dZSNY2tN1oZzsNvpft_Y/pub

Velserver installation: https://docs.google.com/document/d/e/2PACX-1vS0sE7oPRRa9MWXdyJB66_vmq5fKKMcWvkMZJWL-XJ6Z05pFy8TDdDlMIa1Olej-Wal2Umw32EEjJn6/pub

Velserver Internal Documentation: https://docs.google.com/document/d/e/2PACX-1vQtVpozXUgypN6_IAmaaVj0cxtqXUYm1gj_n4nqt8vWeznqdSgb8g1LCHe_bkZmlg0-WkLHiYUKFa7S/pub

Velserver Components: https://docs.google.com/drawings/d/e/2PACX-1vTauZFqoRHuUSa8gNlJ15Jba3gulAxg97Eq0klhWF8_jjcmtFnaNoVDj6-qjgC6WpFY5_m8R9zy-IBN/pub?w=960&h=720