OpenGL._bytes
8-bit string definitions for Python 2/3 compatibility
	Defines the following which allow for dealing with Python 3 breakages:
	STR_IS_BYTES
STR_IS_UNICODE
	Easily checked booleans for type identities
	_NULL_8_BYTE
	An 8-bit byte with NULL (0) value 
	as_8_bit( x, encoding='utf-8')
	Returns the value as the 8-bit version
	- unicode
- always pointing to the unicode type
- bytes
- always pointing to the 8-bit bytes type