Updated 'hour of code' link, as code.org's redirect seems to be broken. See #122
Updated Android mode URL.
Merge branch 'master' of github.com:processing/processing-docs

# By Scott Murray
# Via Scott Murray
* 'master' of github.com:processing/processing-docs:
  Updated 'hour of code' link, as code.org's redirect seems to be broken. See #122
Contribs: Added Loom, renamed SvgExe to JarMatey, updated list.