symlink in chroot related bugfix for dpkg origin and desktop icons
torbrowser: removed redundant UWT_DEV_PASSTHROUGH variable, which was no longer in use.
torbrowser / whonix_internal_install_script:
Do no longer re-download Tor Browser if a previous build already did.
Renamed -force-install-dev-passthrough to -dev-build-passthrough.
Removed redundant exporting of variables.
master branch will now be used for project description only. source code can be found in other branches. therefore removed the source files from the master branch.