Beta Update #4

Issue #35 fixed by reworking Search box templates to use `$mybb` object (saving unnecessary queries) and added options to the search box.

Issue #36 fixed by checking that an add-on module is installed before upgrading (casued uninstalled modules to instantly be re-installed on load (any load of `Sidebox_handler` object)

Issue #29 addressed again to further simplify moduls as much as possible for the developer and end-user while maintaining performace and functionality.

Thanks to @avril-gh for patience and for speaking up!