readme file with instructions

st7565-lcd/README.md

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+# raspilcd
+
+## dependencies
+
+* BCM2835 library: [(http://www.airspayce.com/mikem/bcm2835/](http://www.airspayce.com/mikem/bcm2835/index.html)
+* GNAT compiler: `sudo apt-get install gnat`
+
+## building
+
+`gnat gnatmake raspilcd.adb -largs /usr/local/lib/libbcm2835.a`
+
+## using
+
+`sudo ./raspilcd test.bmp`