Adding vibration and gyro functionality

[BeanCounterTop]

Added vibration and gyro functionality.
Added BYTEPATTERNS class to constants.py to name, contain, and dynamically generate bytepatterns (e.g., b'\x01\x00') using named hex strings also stored in class (e.g. '0100')
Added support for queued writes to allow for multithreading (sending vibrations while reading gyro data, for example)
Changes assume python3 due to the use of string formatting.

This is an initial PR, I've not yet incorporated the new bytepattern usage into the existing functions for auth, etc. I have done this in my derivative project, but I wanted to give you the chance to review these changes in isolation before moving forward there to see if they fit with your design goals.

[satcar77]

I quickly went through your commits and found it impressive. Although I haven't run the code or tested it, your project looks promising. I would gladly accept the PR once you finish off the functions you intend to implement. Thank you for the contributions to the repo.

[Skypow2012]

@NateSchoolfield Hello, is this gyro worked?I find my miband4 can not write in 00000002-0000-3512-2118-0009af100700

[Skypow2012]

This is worked, I got the gyro data from my mi band 4, @NateSchoolfield thanks!

[eduardopp]

@Skypow2012 were you able to make it work? mine is stuck in "Starting gyro..." - no output comes out.
Also @BeanCounterTop could you please share the final version (if it exists)?
Thank you both :)