v0.6.2

Features and Enhancements:

• Added warning when users push dataframes using HiveServer2Client.push when default table properties are implicitly used.

Bugfixes:

• Fix reference to self.remote in WebHdfsClient constructor, which causes the client to be prepared at creation time rather than lazily deferred until first use.
• Fix empty StringIO buffer being returned when opening a non-existent file with mode 'r'.