Init commit with many years of arduino sketches and projects. I dont know if the esp8266 includes much, but there are also libraries. I hope they dont have crazy automatic versioning through the Arduino IDE.

libraries/NewliquidCrystal/thirdparty libraries/SoftI2CMaster_/SoftI2CMaster.h

@@ -0,0 +1,68 @@
+/*
+ * SoftI2CMaster.h -- Multi-instance software I2C Master library
+ * 
+ * 2010-2012 Tod E. Kurt, http://todbot.com/blog/
+ * 2014, by Testato: update library and examples for follow Wire’s API of Arduino IDE 1.x
+ *
+ */
+
+#ifndef SoftI2CMaster_h
+#define SoftI2CMaster_h
+
+#include <inttypes.h>
+
+#define _SOFTI2CMASTER_VERSION 13  // software version of this library
+
+
+class SoftI2CMaster
+{
+
+private:
+  // per object data
+  uint8_t _sclPin;
+  uint8_t _sdaPin;
+  uint8_t _sclBitMask;
+  uint8_t _sdaBitMask;
+  volatile uint8_t *_sclPortReg;
+  volatile uint8_t *_sdaPortReg;
+  volatile uint8_t *_sclDirReg;
+  volatile uint8_t *_sdaDirReg;
+
+  uint8_t usePullups;
+  
+  // private methods
+
+  void i2c_writebit( uint8_t c );
+  uint8_t i2c_readbit(void);
+  void i2c_init(void);
+  void i2c_start(void);
+  void i2c_repstart(void);
+  void i2c_stop(void);
+  uint8_t i2c_write( uint8_t c );
+  uint8_t i2c_read( uint8_t ack );
+  
+public:
+  // public methods
+  SoftI2CMaster();
+  SoftI2CMaster(uint8_t sclPin, uint8_t sdaPin);
+  SoftI2CMaster(uint8_t sclPin, uint8_t sdaPin, uint8_t usePullups);
+
+  void setPins(uint8_t sclPin, uint8_t sdaPin, uint8_t usePullups);
+
+  uint8_t beginTransmission(uint8_t address);
+  uint8_t beginTransmission(int address);
+  uint8_t endTransmission(void);
+  uint8_t write(uint8_t);
+  void write(uint8_t*, uint8_t);
+  void write(int);
+  void write(char*);
+
+  uint8_t requestFrom(int address);
+  uint8_t requestFrom(uint8_t address);
+  uint8_t read( uint8_t ack );
+  uint8_t read();
+  uint8_t readLast();
+
+};
+
+#endif