1.0.2 Release

[timvaillancourt]

1. Fixed 'username' vs 'user' typo for command-line flag. Resolves Cannot authenticate with a user - config.username != config.user #120.
2. Updated scripts/build.sh for new Pip 9+ cache flag. Resolves build script error #119.
3. Close oplog tailer files cleanly and raise Resolver thread errors. Resolves ResolverThread not end #121 and Resolver TimeoutError #143.
4. Support new 3.4 balancer state commands. Resolves check_balancer_running method never returns True on 3.4 #136.
5. Fix for ignored 'none' value for 'backup.mongodump.compression', new default: 'auto' for auto-discovering gzip. Merges/resolves PR prevent backup.mongodump.compression 'none' to be overwritten #126.
6. Ignore bson errors for UTF-8 fields in tailed-oplog documents, merges/resolves PR ignore bson unicode decode error #127 .
7. Send mongodump password via stdin (if mongodump 3.0.2+) to prevent password leak.
8. Set readPreference to 'secondary' if mongodump is 3.4+. This will cause an error if an oplog-tailing Secondary becomes Primary (due to failover after choosing a Secondary).
9. Dockerfile updated to use mongodump 3.4.x.
10. Fix for replicaset-scoring quorum count problem.
11. Fix for creating log directory if it doesn't exist.
12. Fix for creating a log file when process is locked.
13. Updated 'links' in README.