system.GlobalSave
system.GlobalLoad
system.GroupSave
system.GroupLoad
Save files are uncompressed JSON objects for now. Compatibility with
System40.exe saves would be nice, but the format appears to be
encrypted.
Minifying & compressing the JSON should be done at some point but for
debugging purposes I've left it totally uncompressed.
This commit also fixes a bunch of undefined behavior when assigning to
'heap[...]' with an rvalue that could initiate a realloc of the heap.
