Added Ubuntu 20.04 fresh installer for Wowza version 4.8.17+1

readme update and versioning

Added Wowza 4.8.13+1 installers

added releasenotes

added upgrade to 4.8.12+1 for ubuntu 20.04 LTS

Updated Ubuntu 18.04 Upgrade to Wowza 4.8.9 incl installation of Java 11

Added CentOS_7.7.1908 / Java 11 / Wowza 4.8.0 installer. Requested by…

… user[csf edit]

Wowza 4.8.0 installer / Java 11 / CSF firewall / Ubuntu 18.04

change of directory

created scripts folder