Add two post-processors

Add two post-processors:
- One that splits the old value against the given separator
  and apply the given template on each part
- A dimensions to {{Size}} pattern matching

We might want to move some to the MassUploadLibrary later.
Add unittest for size pattern matching post processor
Add filename retrieving based on CSV contents
Change encoding for UTF-8
We do not want to align the Artist for this upload
Add post-processing to metadata collection
Fix title making

- We want to have the page in the front title,
- We need to provide the extension if we do not want MediaWiki
  to shout at us for invalid filenames
We do not want to upload one picture, but ALL THE PICS