Add note to "About document expiration" regarding SDK differences in TTL format

There has been some confusion regarding the general server documentation for handling TTL and how the actual SDK's handling TTL:
http://docs.couchbase.com/developer/dev-guide-3.0/doc-expiration.html

The .NET SDK either takes a unsigned int or a TimeSpan; if it's an unsigned int it expects the value to be in milliseconds. Can we make a note on this page that the actual SDK documentation takes precedence here?

Also, the some of the SDK's themselves handle the translation logic defined by the page (at least the .NET and Java I believe); so if your using an official SDK, you don't have to worry about the Unix conversion or the < 30 days or > 30 days bits.