MGflashfm

This version includes:

1. wrapper functions to run multi-group multi-trait fine-mapping with single-trait fine-mapping and flexible versions that allow for single-trait fine-mapping input from an alternative method
2. wrapper functions to run multi-group fine-mapping with single-trait fine-mapping and flexible versions that allow for single-trait fine-mapping input from an alternative method
3. a single-trait fine-mapping approach that adjusts the maximum number of causal variants
4. new flashfm (multi-trait fine-mapping) wrapper function that runs with a single-trait fine-mapping approach that adjusts the maximum number of causal variants