Teensyduino Compatibility Updates

[dmadison]

I went back and found the commit where you made the initial modifications, then updated the library for each release in turn until I got to the most recent version.

Changes from original:

• Serial behavior now mimics the USB_DISABLED flag, which is easier and requires fewer modifications. A Serial class instance still exists for compatibility with existing code.
• Fixed USB compilation errors related to the security descriptor and the unicode symbol in the manufacturer name.
• Fixed compilation of all other USB modes (also done the latest 1.42 PR Edited for Teensyduino 1.42 #26)

I tested each version update using a generic Serial example (USB Serial mode) and the library Simple_Example (USB XInput mode), as well as a few random examples here and there.

Version #	Commit	Date	Latest Arduino Version	Tested Version
1.21	6ed0c5f	3/15/2015	1.61	1.61
1.22	0dcc3a1	4/4/2015	1.6.3	1.61
1.23	66b28af	5/13/2015	1.6.4	1.61
1.24	4cf71a4	6/23/2015	1.6.4	1.61
1.25	c0196ca	9/18/2015	1.6.5-r5	1.61
1.26	c006772	11/11/2015	1.6.6	1.6.1
1.27	0254d93	1/5/2016	1.6.7	1.6.7
1.28	8a7f15d	4/10/2016	1.6.8	1.6.7
1.29	bb95e54	7/9/2016	1.6.9	1.6.7
1.3	d1d357b	9/6/2016	1.6.11	1.6.11
1.31	eae6544	11/8/2016	1.6.12	1.6.11
1.32	9c88ebe	12/9/2016	1.6.13	1.6.11
1.33	2b24e39	12/14/2016	1.6.13	1.6.11
1.34	8a02ea6	12/27/2016	1.8.0	1.8.0
1.35	68036bd	1/18/2017	1.8.1	1.8.0
1.36	2852a52	3/31/2017	1.8.2	1.8.2
1.37	7099935	6/19/2017	1.8.3	1.8.2
1.38	a8ed957	8/28/2017	1.8.4	1.8.2
1.39	dba7390	9/6/2017	1.8.4	1.8.2
1.4	3ede33c	10/10/2017	1.8.5	1.8.2
1.41	3ad6599	1/17/2018	1.8.5	1.8.2
1.42	9b5d9f9	6/7/2018	1.8.5	1.8.5
1.43	cb6289f	9/2/2018	1.8.6	1.8.5

(Note that the dates are the release dates of the Teensyduino versions, not the date for that version's cores commit.)

This update also adds compatibility support for 1.43.

I spent awhile trying to figure out how to do this "cleanly" so it would import from the cores repo and you could pull in files for new releases, but I never could figure out how to do it so that you didn't have to track all of the other unrelated files. For each version update I downloaded the old installers and created a new temporary installation, then copied over the vanilla files and resolved the conflicts in git. Tedious, but it got the job done and the result is clean.

This pull request will hopefully bring the repo fully up to date, fixing the few discrepancies in the last update pull request (#26). It will also introduce versioned commits for users with legacy Teensyduino software.

[dmadison]

It doesn't look like this repo is being maintained any longer 🙁 and it seems that Zach's website is offline as well. If anyone is looking for updates, I've split the boards updates into a new repo here, and also created a more comprehensive library that you can find here.