Add basic summary of each library to README.

README.md

@@ -4,3 +4,30 @@ ArduLibraries
 Useful libraries for Arduino
 
 You can download single libraries from "Releases" folder by clicking in the library and then clicking "raw".
+
+DimmerOne
+-------------
+
+Implements a dimmer based on zero-crossing detection of an AC signal, with adjustable frequency and firing angle. Uses interrupts and TIMER1 for accurate timing. 
+
+EasyButton
+-------------
+
+A button debouncing library. You can configure the debounce time, pullup options and a callback function that can be called on any combination of push, pushed, release and released.
+
+The update() method must be called by the user's application at a greater rate than the set debounce time.
+
+ShiftEasier
+-------------
+
+Sets/reads shift registers, like the Arduino shiftOut and shiftIn functions but combined into a class to support an arbitrary number of bytes
+
+SimpleList
+-------------
+
+A class designed to act list std::vector from the C++ STL. Implements iterator semantics (for looping), but not [] operator access to the array.
+
+TaskAction
+-------------
+
+A class that implements a repeating task every X milliseconds or microseconds. The task is set by passing a function pointer to the class constructor.