Prepare plugins for Cordova registry.

- Update plugin IDs
- Remove url from <dependency>
- Change java package from com.google -> org.chromium
Bump socket version
Change path where chrome.storage is stored.

Removed __ prefix, and for iOS put it in Library instead of Documents
Fix up runtime id in require()s
Add README for syncFileSystem and update its plugin.xml
Remove polyfill-Function.bind since it was for iOS 5 only.
Update README for Blob polyfill
Remove instructions from XHR polyfill README
Add storage as a dependency of runtime
Don't immediately set app ID when setting manifest. Do it lazily.
Bump notifications version
Fix missing semi-colons on ChromeStorage.m
Add README for storage plugin
Add cordova.file as a dependency to syncFileSystem.
Add API Console instructions to chrome.identity README
chrome.identity - Set lastError on failure and read scopes from exec() for native auth.
Catch security exception when clearing auth tokens.
Update readme with web vs android client id note.
Re-add <dependency> urls on master branch