Updated eclipse tutorial

Replaced a dead link to the creativecoding.org tutorial by a link to
the archive of the page on Internet Wayback Machine.
Merge pull request #78 from SableRaf/master

Update to the Eclipse tutorial (replaced dead link)
removed textureSampler reference
fixed fonts in pipeline image
Processing donation/download system. Some generic info in download/README.md
Still needs complete validation and styling of download page
Adding the donate/download index
Updating web todo
Re-enabled YahooWeather (formerly GoogleWeather) contribution.
Merge branch 'master' of https://github.com/processing/processing-web
Fixed link to Share library.
Added SelectFile library.
Re-enabled keystone and Nest libraries.
XML file update for new Game of Life example
fix small typo.

super small typo :)
Merge pull request #91 from leematos/patch-1

fix small typo.
Updated reference README with a tip
adding size() for clarity issue #95
new images for data tutorial
whoops JPGs not PNGs for data tutorial
Proper header imager
Update README.md