Fix for qpmuploader to use correctly the settings file. Also updated documentation.

To download and install any of the QPM packages below, use the qpm-download command in your Qcodo installation, for example:
qcodo qpm-download marcosdsanchez/qpmuploader_fix

To upload your own update or version for this QPM package, use the qpm-upload command in your Qcodo installation, for example:
qcodo qpm-upload -p your-password your-username/qpmuploader_fix

(Note that the "qcodo" command refers to the qcodo or qcodo.bat script in your cli directory.)