Stack trace on scalatest failures
Merge branch 'master' of github.com:amplab/shark into ampmaster
Add DictEncoding support for Int and Long. 32K uniques using Shorts for encoding
Merge branch 'master' of github.com:amplab/shark into ampmaster
Removed no-longer-needed repos
Capitalize CacheType enums
Some comments for CacheTypes and small refactoring.
Add a "shark.cache.type" flag in TBLPROPERTIES

This allows the user to pass a string representation of a supported cache type (heap, tachyon).

The flag addition also fixes a bug where passing 'shark.cache'='false' causes an InvalidCacheTypeException to be thrown.
Remove "shark.cache.type" property. Handle "shark.cache"="false".
Merge pull request #148 from harveyfeng/partition-caching

Add a new 'shark.cache.type' table property. Also included are a few comments and some small refactoring.
def hasNext is now part of the ColumnIterator interface.
Test iteration across column types for both RLE and Dict.
Test non-selection of compression algos.
Test and add Long Columns to RLE supported types.
override def hasNext
Merge pull request #147 from markhamstra/deadRepos

Removed no-longer-needed repos
Merge pull request #146 from junkumar/dictshort

Add DictEncoding support for Int and Long.
Added more documentation to the compression code and slightly simplified the dictionary encoding algorithm.
Simplified dictionary encoding even more.

1. No need to store the "index" for each value in the dictionary.

2. Use an array instead of a hash map for decoding.
Removed the position argument in ColumnType.extract / extractInto.
Refactored column iterator interface to remove computeNext().
Improved size estimation for compression algorithms and added licensing header to all files.
Merge pull request #150 from amplab/compression-clean

Column compression cleanup