version 0.2.0
- Added na.action option for model-based imputation (thanks to Soogeun Park)
- impute_rhd, impute_shd, and impute_knn now have option 'backend="VIM"'
- removed call to structure(NULL,*) to comply to changes in R-devel (thanks to Martin Maechler)

version 0.1.0
- initial release
