Basic workflow example in man page

User struggle with understanding the concept of Machinery, when
they don't take the time to read through all the man page. A
quick introduction with examples would help with that.

Since there are already enough descriptions about machinery and
its concept in the man page I just provided examples as a
quickstart guide.
Remove the generated man page part machinery_main.1.md
Update man README about correct path to the main man page file
Merge pull request #321 from SUSE/basic_work_flow_example2

Basic work flow example2