add how-do-i-create-a-new-group.md
remove how-do-i-create-a-new-group.md
add is-it-possible-to-create-a-new-group.md

updated article with @cuttarug's suggestions
fix typo
Merge pull request #158 from sharocko/how-do-i-create-a-new-group

add how-do-i-create-a-new-group.md