Tags

- updates build image with latest versions
- adds new image to provide Cevelop IDE

Tree utility added to image for bats tests

Added bats and shellcheck utilities to image  and update of compilers

Image update with gnu (gdb) and clang (lldb) debugger

clang-9 specific apt repository added

added tox utility to image

added test cases to check different usage scenarios of image

pip.conf moved to system wide config location

startup script improved to source venv in most cases

This image is now ubuntu:16.04 based and contains a lot of compilers

- g++ 4.7 .. 9.1
- clang 6 .. 9

added lib32-libnsl to image

changed ttf font to a valid one again

manually push tagged images

Updated base image and packages

update of build image

New base image

First build image