Release 0.5.2

Major Features And Improvements

• We've made single document formula applier 4 times faster!
• model.shrink function added in Python and R wrappers.
• Added new training parameter metric_period that controls output frequency.
• Added new ranking metric QueryAverage.
• This version contains an easy way to implement new user metrics in C++. How-to example is provided.

Bug Fixes and Other Changes

• Stability improvements and bug fixes

As usual we are grateful to all who filed issues, asked and answered questions.