Imputation pipeline

There are at the moment two collaborating initiatives:

• VU: Mathijs Kattenberg and Joukejan Hottenga using IMPUTE
• UMCG: Lude Franke, Harm-Jan Westra, George Byelas, Morris Swertz using Beagle

The objective is to bring these pipelines into the same space so they can be properly compared and optimized.