Update nova_characters.php

Moved declaration of $pos outside of if/else because it is used further down for all access levels and was erroring when the user's level was 1.
Merge pull request #241 from evshell18/patch-2

Update nova_characters.php
Fix issue with creating and editing wiki pages

Users who didn't have wiki/categories permissions weren't able to make
changes to wiki pages.
Update the CHANGELOG and README
Update for the 2.2.2 release
Merge branch '2.2/develop' into 2.2/master