make UnrealPointer support pointers to properties, rework PropertyProxy to use it
#139
| Job | Run time |
|---|---|
| 11s | |
| 7m 52s | |
| 3m 28s | |
| 2m 32s | |
| 8m 22s | |
| 3m 11s | |
| 4s | |
| 2m 44s | |
| 1m 52s | |
| 1m 50s | |
| 38s | |
| 40s | |
| 1m 18s | |
| 1m 40s | |
| 36m 22s |