Merge pull request #23 from leider/master

First steps with editing members
added grunt watch to readme
don't check .json files in stores
Changed callback use for store.saveMember
separated tests for members/store
Merge branch 'member-saving'
changed callback name, as it does not expect an argument any more
Merge branch 'member-saving'
Merge pull request #24 from ggramlich/master

Improvements on the callback use to save members