saveMember now also gets the old member data.
Update documentation for standalone Mac OS X CLI and grunt cli.

* When you have installed the standalone version of the xcode command line tools,
  xcode-select will fail during `npm install`, see http://stackoverflow.com/questions/12135979/node-js-can-not-install-iconv-module
* Installing grunt before grunt-cli will let the build fail. As stated on http://gruntjs.com/getting-started, `grunt` has to be
  removed before installing `grunt-cli`.
Merge pull request #89 from mfriedenhagen/mac-os-x-cli-only-documentation

Update documentation for standalone Mac OS X CLI and grunt cli.
Merge pull request #88 from NicoleRauch/master

Datenbank liest jetzt ganze Listen von Elementen aus
GroupsAPI.updateSubscriptions() now accepts old and new email address and transfers subscriptions if the email addresses differ. Existing tests are adapted, new tests for email address change are added.
Merge remote-tracking branch 'upstream/master'