Native Memory support for J-masm

[charlie-sans]

Since Sharp masm natively supports memory mapped files, i though it would be nice to see j-masm get this feature.

though a few day's ago i was testing out native image to see what the performance gains, and lets just say native image won't give us speed increases.

the least i could do to give people something that could help is having file based mapped memory for things like:

• expanded storage for state, macro's and storing Instructions in memory
• Memory expansion
• Filesystem based Mounting
• mounting files to virtual parts of memory, like extensions.

these are some things that memory mapped files could be useful for.