Alan Chang

Add "To Float" and "From Float" operations

1

I added the "To Float" and "From Float" operations which converts between single & double-precision floating point in IEEE 754 and raw bytes. Fixes #432

Use mprocessing config for evm report workers

1

Currently, the evm report workers default to using `multiprocessing.Process` and ignore the `--core.mprocessing` config setting. This is not very desirable and can lead to issues such as #1715 on MacOS....