Added license and readme

README.md

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+# Snapraid Runner Script
+
+This script runs snapraid, and sends it output to the console, a log file and
+via email. All this is configurable.
+
+It can be run manually, but its main purpose is to be run via cronjob/windows
+scheduler.
+
+## How to use
+* If you don’t already have it, download and install
+  [the latest python 2.7](http://www.python.org/getit/).
+* Download [the latest release](https://github.com/Chronial/snapraid-runner/releases)
+  of this script and extract it anywhere or clone this repository via git.
+* Copy/rename the `snapraid-runner.conf.example` to `snapraid-runner.conf` and
+  edit its contents. You need to at least configure `snapraid.exectable` and
+  `snapraid.config`.
+* Run the script via `python snapraid-runner.py`.
+
+## Features
+* Runs `diff` before `sync` to see how many files were deleted and aborts if
+  that number exceeds a set threshold.
+* Can create a size-limited rotated logfile.
+* Can send notification emails after each run or only for failures.
+* Can run `scrub` after `sync`