Facebook SDK
Merge branch 'master' of github.com:PortNumber53/facebook-php-sdk

# By Doru Moisa (6) and others
# Via Doru Moisa (2) and others
* 'master' of github.com:PortNumber53/facebook-php-sdk:
  use the same signedRequest in the test
  Aded line breaks and aligned comments
  Updated/Added/Fixed PHPDoc Blocks.
  Updated version number in readme.md
  removed stateful functions; allow for fallback when the forwardProxies array is empty (via gfosco)
  Added ability to disable the signed_request parameter for non-canvas apps.
  Added .DS_Store and .idea to .gitignore
  fixed typo
  switched from strtok() to explode()
  Added support for multiple chained proxies that append a comma and their hostnames to the previous X-Forwarded-Host header.     If we have Client <---> Fwd Proxy1 (first.proxy) <---> Fwd Proxy2 (second.proxy )<---> Application (third.server), then we     will have these values for a script executed on third.server::
  fixed typos
  added proxy support; fixed multiple chained proxies present in HTTP_X_FORWARDED_HOST which cause getHttpHost() to break api calls
Moving class to classes folder