Strict projection for dates timestamps

[moulimukherjee]

Implementing strict projection for Dates and Timestamps #35

Handling only the boundaries instead of #283

[moulimukherjee]

Expected behaviour: ts > 2019-07-07T23:59:59.9999 can be projected strict using ts_day >= 2019-07-08

But for ts > 2019-07-07T15:46:37.89789, ts_day >= 2019-07-08 will only return a subset of the records (not returning records between 15th hour and last hour of 2019-07-07), so it cannot be a strict projection based on https://github.com/apache/incubator-iceberg/blob/master/api/src/main/java/org/apache/iceberg/expressions/ResidualEvaluator.java#L203

[moulimukherjee]

@rdblue Does this look sane?

[moulimukherjee]

After discussing offline, this behaviour is not accurate. Closing.