Refactor and extends statistics computation for split pruning
1. Between and in clause pruning., 2. A simple bloom filter implementation 3. Murmur Hash 3 implementation in scala using Austin Appleby's x86-32 impl
Resolve merge conflicts
More tests for Column Stats
Merge pull request #129 from harsha2010/harshars-stats

Refactor column stats., add between and in pruning. introduce bloom filter and murmur hash implementation