Added blobscanner to contributions.
Merge branch 'master' of https://github.com/processing/processing-web

# By Daniel Shiffman (4) and others
# Via Daniel Shiffman (1) and Yong Bakos (1)
* 'master' of https://github.com/processing/processing-web:
  Correcting object reference in PShape tutorial.
  Correction to else.xml
  Exhibition Update
  adding release 2.1.1
  Corrected param names in description to be consistent with new param names in source
  Remove 2013 Fundraiser note from homepage and download form
  typo #325
  missing period #326
  typos #327 #328 #329
  r should be row #324
  Updated errata file for Handbook