Windows I2C simulator / SHTxx driver / GUI and tokenizer extension / Fix Linux simulator webif

[MaxineMuster]

Add Windows I2C simulator for BMP280/BME28, AHT2X, SHT3x/SHT4x, CHT83xx
Add SHTxx driver to serve (multiple) STH3x / SHT4x sensors
Add extension to tokenizer to allow "named" arguments like "SDA="
Add command to "register" a pin as used by a driver w/o an IOrole set in webif

[MaxineMuster]

Windows: Add I2C simulator for BMP280/BME28, AHT2X, SHT3x/SHT4x, CHT83xx
Adding a simulated sensor with
Sim_AddI2Csensor SCL=[SCL-pin] SDA=[SCL-pin] address=[I2C address] type=[SHT3x|SHT4x|bmp280|bme280|aht2x|CHT83xx|CHT8305|CHT8310|CHT8315]

Examples:

	 Sim_AddI2Csensor type=SHT3x SCL=24 SDA=17 address=0x45
	 Sim_AddI2Csensor type=SHT4x SCL=26 SDA=16 			// using default address 0x44
	 
	 Sim_AddI2Csensor type=AHT2x SCL=16 SDA=26			// using default address 0x38
	 
	 Sim_AddI2Csensor type=bmp280 SCL=17 SDA=27 address=0x76
	 Sim_AddI2Csensor type=bme280 SCL=15 SDA=25 address=0x76
	 
	 Sim_AddI2Csensor type=CHT83xx SCL=17 SDA=27			// using default address 0x40
	 Sim_AddI2Csensor type=CHT8305 SCL=15 SDA=25 address=0x40
	 Sim_AddI2Csensor type=CHT8310 SCL=16 SDA=26			// using default address 0x40
	 Sim_AddI2Csensor type=CHT8315 SCL=18 SDA=28 address=0x40

Add SHTxx driver to serve (multiple) STH3x / SHT4x sensors

Starting driver with
startDriver SHTXX SCL=[SCL-pin] SDA=[SCL-pin] address=[I2C address] chan_t=[temperature channel] chan_h=[humidity channel] type=[3|4]

Adding additional sensors:
SHTXX_AddSensor SCL=[SCL-pin] SDA=[SCL-pin] address=[I2C address] chan_t=[temperature channel] chan_h=[humidity channel] type=[3|4]

Examples:

	startDriver SHTXX SCL=13 SDA=23 chan_t=2 chan_h=3 type=4		// using default address 0x44
	SHTXX_AddSensor SCL=14 SDA=24 chan_t=4 chan_h=5 type=3 address=0x45 

Extended CHT35XX to allow setting pins and channels by CMD:
startDriver CHT83xx SCL=[SCL-pin] SDA=[SCL-pin] chan_t=[temperature channel] chan_h=[humidity channel]

Example:
startDriver CHT83xx SCL=17 SDA=27 chan_t=2 chan_h=3

Add extension to tokenizer to allow "named" arguments like "SDA="
see above - used for SHTXX and CHT35xx driver

New commands (since we don't know if the argument is present, we always provide a default to return if argument is missing):

const char *Tokenizer_GetArgEqualDefault(const char *search, const char *def);
int Tokenizer_GetArgEqualInteger(const char *search, const int def);
int Tokenizer_GetPinEqual(const char *search, const int def);

Add command to "register" a pin as used by a driver w/o an IOrole set in webif
setPinUsedString(PIN, [string to show as usage in webif]);
Used e.g. in SHTxx driver with

	setPinUsedString(dev->i2c.pin_clk, "SHTXX SCL");
   	setPinUsedString(dev->i2c.pin_data, "SHTXX SDA");

Example in Windows simulator with

	backlog Sim_AddI2Csensor type=CHT8305 SCL=17 SDA=27;  startDriver CHT83xx SCL=17 SDA=27 chan_t=2 chan_h=3
	backlog Sim_AddI2Csensor type=bme280 SCL=11 SDA=21 address=0x76 ;startDriver BMP280 11 21 6 7 236
	backlog Sim_AddI2Csensor type=SHT3x SCL=14 SDA=24 address=0x45; Sim_AddI2Csensor type=SHT4x SCL=15 SDA=25; startDriver SHTXX SCL=14 SDA=24 chan_t=4 chan_h=5 type=3 address=0x45;  SHTXX_AddSensor SCL=15 SDA=25 chan_t=8 chan_h=9 type=4;

simulated sensors on WebPage:

[MaxineMuster]

Linx Webif (with simulated I2C sensors like Windows simulator):