Add bootlogo wrapper
This is a fix for issue https://secogroup.atlassian.net/browse/YT-129 bootlogo: Add wrapper script to make the manual logo exchange simpler
Added a bootlogo.sh - a wrapper to prepare-logo.sh script.
It supports following arguments:
- -b|--background, which allows to set background color (black or white).
- -f|--file, which allows to set which file to use.
- -r|--remove, which will tell prepare-logo.sh to cleanup logo.
Wrapper will call prepare-logo.sh with proper arguments and other support scripts to apply logo to the system.