Allow lib_dir not to be a descendant of the base directory for documents derived from html_document_base
#925
| Job | Run time |
|---|---|
| 5m 43s | |
| 2m 31s | |
| 3m 51s | |
| 3m 40s | |
| 10m 42s | |
| 4m 9s | |
| 3m 34s | |
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| 3m 30s | |
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| 4m 1s | |
| 4m 14s | |
| 11m 51s | |
| 3m 46s | |
| 3m 52s | |
| 4m 19s | |
| 1h 17m 11s |