Renamed getAllEntries

Renamed getAllEntries to getEntries for consistency fixes #17
Extended Backend

Added logout.php
Extended backend

Added login.php
Removed duplicate file

Removed getAllEntries.php because it failed to do it in previous commit
Extended Backend

Added getFilteredEntries.php
Merge branch 'master' of https://github.com/CrazyCrud/shithouse_poetry
Extended Backend

Enabled getting the user with the authkey fixes #24
Backend Bugfix

Added setAuthKey to logout, shouldn't be necessary to forward the key to database layer and not needed to be set by database layer