Squashed 'ApportableFacebookSDK/' changes from 9546d87..e66a274

e66a274 Switch to using open-source ApportableWebViewController
e7ef819 Add 'ApportableWebViewController/' from commit '294137cd282b15a2f86af45b55a11bb5c39911eb'
36fea4a Allow overriding FBSession WebDialog title
d54676f Default to using the WebDialog
20269fc Do not specify a default title for the WebDialog view
294137c Initial example app
2c4438b Initial code drop
575c688 Initial commit
e1fda89 Unset delegate to prevent crash on dangling pointer
5281508 Don't piggyback custom params into URL request
d343483 Route around UIWebView with Apportable's UIWebViewController
4ba9221 make it buildable as a module
1401c23 fix merge damage
465044d Fix leak
e942829 Update to latest FBSDK
611058a use dlsym to load symbols

git-subtree-dir: ApportableFacebookSDK
git-subtree-split: e66a2748fd75d556058d1dfc7a4284ccd905852e
Merge commit 'cb84f8b4e7887134b3c7e3935c8f27cfdf8d8ad3' into facebook-sdk