Multiplexer Deactivates Itself After Sleep

[prototypicalpro]

Describe the bug
When using the I2C multiplexer and LoomManager::sleep, the multiplexer will mark itself deactivated by setting Loom_Module::active to false during Loom_Multiplexer::power_up:

Loom/src/Multiplexer.cpp

Lines 402 to 410 in fc36a8d

	void Loom_Multiplexer::power_up() {
	// Begin I2C
	Wire.begin();
	Wire.beginTransmission(this->i2c_address);
	if(Wire.endTransmission() ) { //< Test on this address
	//< Test Failed
	LPrintln("Multiplexer not found on specified port. Checking alternate addresses.");
	this->active = false;

causing subsequent measure calls to ignore the module:

Loom/src/Manager.cpp

Lines 197 to 200 in fc36a8d

	void LoomManager::measure()
	{
	for (auto module : modules) {
	if ( !module->get_active() ) continue;

The module will then remain deactivated even after calling LoomManager::power_up after the board has fully powered on.

While it makes sense to me that Loom_Multiplexer::power_up would deactivate the module because it cannot communicate with the multiplexer before the Hypnos is powered on, it is not clear to me why subsequent calls to Loom_Multiplexer::power_up do not reactivate the module. More investigation is needed.

Hardware in Use
Tested on the SitkaNet setup, but should reproduce on any Feather/Hypnos/Multiplexer project (so long as the multiplexer power controlled by the Hypnos).

To Reproduce
Any project using Loom::sleep with the multiplexer should be able to reproduce this issue. Simply load any sketch using sleep and the multiplexer, allow the board to sleep/wakeup once, and the board will no longer measure any multiplexer sensors.

[prototypicalpro]

15999f7 temporarily fixes the issue.

[prototypicalpro]

The solution proposed to this is to move all automatic re-initialization code in LoomManager::sleep() to the sketch. This will also resolve issues with the ordering of DS3231 power up and toggling of hypnos pins. More documentation on proper powering up routines will be needed after this change (#79).