Add M7E Hecto Support

M7E has some minor differences that required updates to get it working, mainly just different NA region support and extra bytes to read memory banks.

Also modified all the examples to have user-selectable serial interface, baud rate, and module type. This removed the need for the dedicated hardware serial examples, so those have been removed.

All changes are backwards compatible with the previous version.

v1.1.1

Fix compilation errors for ESP32, and update README regarding SoftwareSerial.

v1.1.0

Add GPIO support. Can be used like so:

• nano.pinMode(1, OUTPUT)
• nano.digitalWrite(1, HIGH)
• nano.digitalRead(1)

Revert atoi and fix for writeEPC bug

Thanks paulvha: https://forum.sparkfun.com/viewtopic.php?f=118&t=49574&start=15

Fix bad code in example 1

v1.0.6

Lib ver roll

Fix writeEPC function to work on stricter platforms

Now compiles on Teensy and MKR.

Fix UID example

v1.0.4

Rolling lib ver. Adding to keywords.

Fix for issue 7

v1.0.3

Rolling lib ver

PRs implemented

v1.0.2

Merge branch 'master' of https://github.com/sparkfun/SparkFun_Simulta…