docs for teracy's workflow [#5]

It's important to have a consistent workflow for tericiers to work together.
docs for teracy's workflow [#5]
add git branching off section
docs for teracy's workflow [#5]
Add one more rule to quality checklist: no tab characters are allowed
docs for teracy's workflow [#5]

Add ``git branch cleaning up`` section, reformat text to make sure meet 100 character line length
docs for teracy's workflow [#5]

Add Git push force section