Range of time values

[kquick]

When sending a time value to the server, an integer number of milliseconds is sent. This is generated as an Int by the timeToServer function. The possible range of this value should be determined for the APIv4 work and the resulting type should probably also have a validation on the conversion (although it could be argued that there's nothing the client could do in an overflow situation, but the valid range for the current API version should at a minimum be documented in the conversion).

[jtdaugherty]

As I mentioned elsewhere, it is better to use Integer to avoid overflow since these are millisecond timestamps.