Convert MGRS to latitude longitude and vice versa

Using local copy of projec4js library.
source - https://github.com/proj4js/mgrs
modify the library to use function() only, no export syntax: forward(), toPoint(), LLtoUTM()
Norway (zone 32V) and Svalbard (zone 33X) are correctly converted.
This code allows MGRS to have spaces and lower case, which is not formal MGRS standard.