* normalize '.' (dot) to '-' (dash) in service names
* added warning about the dot character replacements in service names
* fix gofmt compliance
* also normalize container names (need lowercase)
* splitted normalization for volumes and service names into different functions (it conflicted with './' volumes replacement)
* changed volume normalization to use the new own normalization function
* changed container normalization to use its new own normalization function
* updated as per discussed in PR #1063 review
Roberto C. Morano
424f1a9a2c