Implement the readme

readme.md

+#Planet Red
+Planet Red is UNL's implementation of elgg
+
+#Directory Structure
+* elgg - the elgg directory.  Currently a submodule, checked out at 1.8.19
+* vagrant - various vagrant boxes for development/testing.  Use vagrant/dev/ for development
+* plugins - Our custom plugins such as auth and themes that need to be symlinked.  Keeping the plugins out of the elgg directory makes for easy upgrades.
+
+##Setup
+1. Initialize submodules by running `git submodule init` and then `gitsubmodule update`
+
+##Using Vagrant
+For now, use the dev vagrant box at vagrant/dev/
+1. `cd vagrant/dev/`
+2. `vagrant up`
+3. go to http://localhost:8005 to view the project 
+
+##TODO
+* implement the UNLedu Framework 4.0 theme at plugins/unl_theme
+* implement UNL auth at plugins/cas_auth_unl
+* make sure profile image routes still work
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