Release 0.0.5

This update brings a ton of new powerful features to daru.

Highlights:

• New improved plotting DSL
• Faster CSV loading
• Compatibility with nmatrix and statsample
• Ability to split or group data with the #group_by function
• Generating quick data statistics with #pivot_table
• A whole array of statistics functions on Daru::DataFrame
• Hierarchical indexing of data with Daru::MultiIndex
• Bugfixes

Check the History.txt file for a complete list of changes.