Remove bad checkCast from DWRF long stream
Improve unknown value stream error message
Fix ORC map writer for null keys

Map entries with a null key are ignored (not rendered)
Reset in-dictionary stream when opening the stripe or row group
Reset slice dictionary stream for safety
Fix BooleanStream skip bugs

Adjust data byte when skipping bits
Fix skip to end of stream
Add toString to OrcInputStream
Add ORC checkpoints

Only flush buffered values if necessary
Fix Hive partition pruning for null keys

Fixes #1864
Remove unused StorageManager H2 database
Do not write CRC files for Raptor
Cleanup Raptor staging directory
Update cassandra driver to 2.1.0

The 2.0.0-rc2 driver has a bug
(https://datastax-oss.atlassian.net/browse/JAVA-254) which gets
triggered when querying through presto.  An exception occurs because the
driver attempts to query a table that no longer exists, and fails.

Cassandra 2.1.0 is the current stable release, so it's probably time to
catch up.  The hector library has been removed and replaced, because it
didn't seem to work correctly with C* 2.1, and the project doesn't
appear to be very active.
Fix formatting
Fix typo in JMX connector documentation
Allow reading/writing sequences of pages with mixed block types

The current implementation causes problems when a single remote request
gets multiple pages that have different encodings for a given column. This
could happen, for example, if the stream is the result of a union of
subqueries or tables that produce different types of blocks for any given column.

The reason is that the identifier for the block encodings is written once per request
based on the encodings of the first page. This fix changes the wire serialization format
to include the block encodings for each page in the response.
Set context class loader when creating ORC writer

The ORC memory manager ends up loading VersionInfo which loads classes
from the context class loader. The tests now set an empty class loader
to verify that it uses the correct class loader.
Add favicon for UI
Add scheduled flag to query info
Only show progress in UI when scheduled