Add a README, containing basic information + License

README.md

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+Digilines
+==========
+- The minetest counterpart for bus systems like i2c, SPI, RS232, USB -
+
+
+This mod adds digiline wires, an RTC (Real Time Clock), a light sensor as well as an LCD Screen.
+Can be used together with the luacontroller from mesecons. See the luacontroller manual for more information.
+
+Send "GET" to RTC or light sensor to retrieve Data, send any text to LCD to display it.
+Select channel by right-clicking items.
+
+License:
+  Code: LGPL
+  Textures: WTFPL