Asynchronous processes

Changelog

1. New: asynchronous running of long processes (ALS/Ambiguity, Kinet/Optimization)
2. Robustifying datafiles inputs to avoid intempestive crashes
3. New: Implementation of external spectral shapes in Kinet (conformity changes in ALS)
4. New: Added choice of delay coordinate (index, delay or log-delay) when loading single matrix
5. New: Display of linear or log-params distributions in Kinet/Identifiability
6. Change standard uncertainty of log-normal parameters to percents (Kinet/Best Params)