Added simple readme

Readme.md

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+# Viddown
+
+This is a video downloader used for pulling videos from the internet to a remote server. This is run on the remote server and calls youtube-dl to download to requested url.    
+
+## Build
+
+Go to the src directory:    
+
+    go build .
+    docker build -t jbreich/viddown:v# .
+
+A Makefile is in progress but currently does not add the version.    
+
+# Run
+
+The default port is 8080. Env VIDDOWNLOC is where videos are saved to.    
+