Creating a readme from the codeplex wiki info. Updating links.

README.md

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+A real-time, always on top, "replica" of a window of your choice, based on DWM Thumbnails.\
+Completely written in C# for .NET 4.0/4.5, makes use of the [Windows Forms Aero](https://github.com/LorenzCK/WindowsFormsAero) library.
+
+Requirements
+------------
+
+You will need the .NET 4.0/4.5 framework and Windows Vista/7/8 with Aero enabled (also known as *Desktop Composition*, which is always enabled on Windows 8).
+
+Installation and User Guide
+---------------------------
+
+Get the [latest version (v.3.5.1)](https://github.com/paulodeleo/OnTopReplica/releases/tag/v3.5.1) from the releases section, both as installer and as standalone portable executable.
+
+Features of current version
+---------------------------
+
+-   Clone any of your windows and keep it *always on top* while working with other windows,
+-   Select a subregion of the cloned window:
+    -   Store the selected subregions for future use,
+    -   Now with *relative* subregions from the window's borders.
+-   Auto-resizing (fit the original window, half, quarter and fullscreen mode),
+-   Position lock on the screen's corners,
+-   Adjustable opacity,
+-   "Click forwarding" allows to interact with the cloned window,
+-   "Click-through" allows to click through the cloned thumbnail (especially useful with partial opacity),
+-   "Group switch" mode automatically switches through a group of windows while you use them,
+-   Non invasive installation doesn't require administrator elevation.