• contrib.logging: inherit existing handler output stream (#1191)
• fix PermissionError by using weakref in DisableOnWriteError (#1207)
• fix contrib.telegram creation rate limit handling (#1223, #1221 <- #1220, #1076)
• tests: fix py27 keras dependencies (#1222)
• misc tidy: use relative imports (#1222)
• minor documentation updates (#1222)