README.md: Fix typo in package name
README.md: Structure the list of dependencies better
README.md: Add dependencies needed to build YaST modules in general
README.md: Add dependencies needed to build specific YaST modules
README.md: Align comments
README.md: Add osc configuration step into "Installation"
Merge pull request #367 from yast/readme-fixes-try-2

[Review] Request from '' @ 'yast/ycp-killer/readme-fixes-try-2'