Gui - requirements

Update

+ check both for "shareable"

Step #1
Load and check for requirements.
Output - at the moment - on Javascript console.
Step #2: Make conflicts visible (with an Icon), and with a Text-Hint, eventually

Test here: https://forum.pjrc.com/threads/60109-Audio-GUI-for-T4?p=241364&viewfull=1#post241364

GUI: fix import

https://forum.pjrc.com/threads/45216-Two-GUI-related-bugs

Please merge afer relase of 1.52 - needs more testing.
however, the examples from that thread seem to work now.

https://forum.pjrc.com/threads/60558-TDM-Out-sending-data-even-if-inputs-not-connected

async_spdif_input constructor arguments

Dmamem alignment

async-spdif-input

fix warnings

Granular documentation fix

some fixes (again) inputs i2s... sorry..

add DMAMEM, fix warnings

fix slave i2s output on teensy 4

Fix CHIP_I2S_CTRL on Init (SCLK=32*fs -> 64*fs)