fix up typos in fieldtype comments
Updated web.config so that website will be compiled in batchmode (batch=true).  It seems to be much faster (15 seconds vs 45 seconds for a full website rebuild).
Added new EncryptedFieldType/EncryptedFieldAttribute which saves it's value in the database encrypted (it gets encrypted/decrypted at the AttributeValue Model layer)
ToDo:  Convert things that should be converted to EncryptedField and make a migration to update the values in the database