Adding pyYAML to dependencies
Merge pull request #36 from oldmantaiter/deps

Adding PyYAML to dependencies
Fix mget that passed a wrong argument
Merge branch 'master' into develop
Optimize PartitionDB and CountDB for get_neighbours
Fix the slowness of bitmap index checking
Bump version number to 0.2.1
some doc changes
fixes for #34 Wrong Data Types for Aggregation Columns
mods for more robust ETL (fixed width decoder, etc)
Boost query performance for aggregation
Bump version to 0.2.2
Remove useless variables