Packages released after time T in the environment when --time T has been specified

When using `--time T` on the commad line in conjunction with a filter that contains inclusinon and exclusion filters, packages released after time `T` are brought to the environment.
i.e

```
rez env foo --time 1456261219 --include 'range(foo)' --exclude 'range(foo

Reproduce the command in the issue with --time, --include, and --exclude, then inspect add_inlcusion() in src/rez/package_filter.py and the package_filter checks around lines 62 and 69 in src/rez/resolver.py. Done means packages released after T are excluded and inclusion-only filters work without an existing filter.

Written by the indexing model from the issue text.