Merge release/v1.2.2 into develop
add README.md
Add CronjobShell
Make export a bit more verbose

Also make sure to clean up tmp files and handle crontab errors
Add comment to non-obvious newline
Merge pull request #15 from nodesagency/feature/cronjob-shell

Add CronjobShell
Removing manual fields serialization, Curl does that for you anyway.
This allows the lib to actually upload files
Merge pull request #16 from nodesagency/hotfix/allow-file-uploads

Removing manual fields serialization, Curl does that for you anyway.
Menu wrapper tag can now be changed.
Merge pull request #17 from nodesagency/feature/menu-helper-tag

Add option to change the menu wrapper's tag.
Preparing release
Preparing submodules for release
Updating semver
Finish release
merge release/v1.2.3 into master