updated description in plugin.xml
Merge pull request #574 from aogilvie/update/plugin-xml-description

updated description in plugin.xml
added check for null permissions
Merge pull request #577 from aogilvie/fix/null-permissions-array

added check for null permissions
Merge branch 'develop' of github.com:wizcorp/phonegap-facebook-plugin into feature/events

Conflicts:
	platforms/ios/www/plugins/com.phonegap.plugins.facebookconnect/www/phonegap/plugin/facebookConnectPlugin/facebookConnectPlugin.js