Merge pull request #12 from jkoncick/master

Several fixes, some from RHEL assistants
This fixes #13
Fix snippets for DA 0.9.0 DSL changes
Start using 0.9.0 Yaml DSL
If Dockerfile doesn't exist in current dir, don't fail with ugly exception
Add remote upstream when --gh-fork is used with 'prep custom'
Try to use new approach to docker containers in assistants
If docker container fails to build, provide user with meaningful messages
Explicitly use section name with 'use' command everywhere
Use 'use' instead of obsolete 'snippet' in c args
Use new 'cl_r' to run commands as root
Prevent yaml parsing error in php assistant
Fix assistants to properly work with improved Github runner
Use official fedora docker image
Improve docker argument description
Remove ddd from dependencies list. #1084279
Fix spelling
Add apostrophe in vim.yaml
Fix English in vim_update.sh

Fix grammatical problems in the output.
Fix inconsistent indentation