Add utf-8 encoding to the two files that have unicodes

See merge request glenveegee/PDBeCIF!6

Fixes #12

Closes #12

See merge request glenveegee/PDBeCIF!5

Add a regex check for non-ascii characters and quotes them inf
_formatVal

have to be explicitily used.

have order).

to "disable" mmap for Python2 users as well.