Don't swallow tracebacks when commands fail.
[#72] Fix for count invalid behavior - use length

Instead of printing space used ('spaceConsumed') from count request
respond, use 'lenght' field. Length field holds space before
replication. This makes snakebite output the same stats as default
hdfs client.
Merge pull request #84 from ravwojdyla/dev

Add sphinx to require and update gitignore
Merge pull request #85 from Julian/master

Don't swallow tracebacks when commands fail.
Merge pull request #87 from ravwojdyla/fix_count

[#72] Fix for count invalid behavior - use length