docs, dev: add Retina display notes, rename macos.txt -> macos.md
#374
| Job | Run time |
|---|---|
| 4m 56s | |
| 4m 9s | |
| 4m 53s | |
| 33s | |
| 4m 34s | |
| 5m 12s | |
| 4m 19s | |
| 4m 22s | |
| 3m 34s | |
| 4m 36s | |
| 4m 38s | |
| 5m 4s | |
| 3m 34s | |
| 4m 55s | |
| 4m 37s | |
| 5m 9s | |
| 4m 52s | |
| 4m 57s | |
| 4m 53s | |
| 1h 23m 47s |