remove of invalid module

- remove of invalid module in preparation to add new module which will
take his place.
- remove of old module as separate commit was necessary to ensure clean
implementation of new module without merging it with old files with the
same names which could potentialy introduce unforeseen issues.
- version bump to 1.3.5 for clean refference of ASB release without old
module included.
- fix small typo in readme.
Release of Avril's Online Staff module as default Advanced Sidebox module.

- clean implementation of Avril's Online Staff v1.0 module as default
Online Staff module within Advanced Sidebox package.
Merge pull request #20 from avril-gh/staff-online-module

official Avril's Online Staff module for Advanced Sidebox