- seamlessly add Freetz-NG cross toolchain builder integration including first cross templates for Fritz!OS (see wiki)
- rename source folder crosstool-ng
- new commandline options -fng / --freetz-ng to open the Freetz-NG menu
- fix unset variables in syscheck-function to avoid multiple checks
- extend the installers to setup the correct packages for Freetz-NG (tested on Ubuntu 20.04, ArchLinux, CentOS 8, Fedora 31, openSUSE in WSL2)
update cross toolchain templates to newest crosstool-NG version
fix version detection of installed libraries in toolchains
config file updates (Please reset the config file)