custom grid alpha
required columns calculation
Merge branch 'bs-custom-grid' of https://github.com/iamsisar/generator-sisar
Revert "Merge branch 'bs-custom-grid' of https://github.com/iamsisar/generator-sisar"

This reverts commit 31b62d566d78a762653f9c7e4ae7775826e25851, reversing
changes made to bf0eec21c9d21e102d3f32dbea5e0a8fa147ea5e.