Errors preventing Social Share sync.

Issue:
Multiple errors syncing social share objects:

* Item failed due to bad token: with [Contact_sharer__c] => [Contact:user:0] in the sobject.
* Social Share Name: data value too large: with the name being similar to [Name] => Social Share - Very Long Donor Name Example (2014-08-07 15:49:31America/New_York)

Fix:
* Limit length pf sobject name and shorten date string.
* Do not set contact token for anonymous user.
* Set name with page name if no donor name available.