I2C delays slowing down code

[dunkmann00]

I noticed while trying to read tags using I2C that it seemed to be taking longer than it used to. After a fair bit of testing trying to track it down, I think it has to do with some of the delays that are present in the library.

Specifically here (Line 74):

Adafruit_CircuitPython_PN532/adafruit_pn532/i2c.py

Lines 71 to 74 in 62ddaaf

	self._req.value = False
	time.sleep(0.1)
	self._req.value = True
	time.sleep(0.5)

and while this isn't as much of a problem, here as well (Line 105):

Adafruit_CircuitPython_PN532/adafruit_pn532/i2c.py

Lines 102 to 105 in 62ddaaf

	if self.debug:
	print("Reading: ", [hex(i) for i in frame[1:]])
	else:
	time.sleep(0.1)

[dunkmann00]

Closed by #41