IMSLP new features (v2.1)

[imslp]

Just thought I'd update everyone on a few new features:

* IMSLP can now list composers whose work pages include recordings (see link in portal page). The idea is to create a browsing system for recordings similar to that for scores.
* New per-file download counter.
* Automated page counting for PDF files (which unfortunately is accurate only about 75% of the time at the moment). EDIT: Now fixed (will still fail on certain files, but shouldn't output inaccurate results).

There will also be a fairly big project/collaboration revealed (hopefully) in November.

[vinteuil]

Excellent work. Thanks for the explanation