add latest Dallas lib from Git

.gitmodules

@@ -10,3 +10,6 @@
 [submodule "firmware/libraries/LiquidCrystal_I2C"]
 	path = firmware/libraries/LiquidCrystal_I2C
 	url = https://github.com/marcoschwartz/LiquidCrystal_I2C
+[submodule "firmware/libraries/Arduino-Temperature-Control-Library"]
+	path = firmware/libraries/Arduino-Temperature-Control-Library
+	url = https://github.com/milesburton/Arduino-Temperature-Control-Library

firmware/libraries/Readme.md

@@ -6,8 +6,8 @@
 |  emonLib |  Jan 5th 2015 | N/A  | [source](https://github.com/openenergymonitor/emonlib)  | [7685720](https://github.com/openenergymonitor/EmonLib/commit/7685720ab391b14edb218151c1d5d3ebc1fd1ec1)  |
 |  JeeLib |  10th Sep 2015 | N/A  |  [source](https://github.com/jcw/jeelib) |  [f097c00](https://github.com/jcw/jeelib/commit/f097c0039c926881d80a74bec7a7aa020de610ee) |
 |  LiquidCrystal_I2C | 29th Nov 2015  | 1.1.2  | [source](https://github.com/marcoschwartz/LiquidCrystal_I2C)  | [6ab83c7](https://github.com/marcoschwartz/LiquidCrystal_I2C/commit/9a4e33e6cdaca805d70e220897d0b59446d52adf)  |
-| OneWire  | 4th March 2016  | N/A  | [source](https://github.com/PaulStoffregen/OneWire)  | N/A  | [ 57c18c6](https://github.com/PaulStoffregen/OneWire/commit/57c18c6de80c13429275f70875c7c341f1719201)
-| Dallas Temperature |  6th Dec 2011 | V3.7.2   | [source](http://download.milesburton.com/Arduino/MaximTemperature/DallasTemperature_LATEST.zip)  | N/A  |
+| OneWire  | 4th March 2016  | N/A  | [source](https://github.com/PaulStoffregen/OneWire)  | [ 57c18c6](https://github.com/PaulStoffregen/OneWire/commit/57c18c6de80c13429275f70875c7c341f1719201)
+| Dallas Temperature |  25th Jan 2016 | V3.7.6   | [source](https://github.com/milesburton/Arduino-Temperature-Control-Library)  | [7e9a2b7](https://github.com/milesburton/Arduino-Temperature-Control-Library/commit/7e9a2b710ae713d0686c3f921c1bbe0b4ebd23fb) |
 | Arduino Wire |  N/A | V1.0   | included in Arduino IDE  | N/A  |
 
 # Installing emonPi Arduino Libraries