Rewrite README.

README.md

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-Please read the [Wiki](https://github.com/garbagemule/MobArena/wiki/Installing-MobArena) for details on how to set up MobArena, and remember to read the [FAQ](https://github.com/garbagemule/MobArena/wiki/FAQ) before posting questions!
+# MobArena
+MobArena is an arena-style minigame for Bukkit-based Minecraft servers.
+
+## Getting Started
+If you don't want to compile the plugin yourself, grab a release artifact from 
+one of these two sites:
+
+- [Bukkit](https://dev.bukkit.org/projects/mobarena)
+- [Spigot](https://www.spigotmc.org/resources/34110/)
+
+The wiki here on Github should have all the information you need to get 
+started using the plugin.
+
+## Getting Help
+If you run into problems or need help with something, feel free to hop on IRC 
+(#mobarena @ irc.esper.net) to have a chat. If you don't know what IRC is or 
+don't have an IRC client, you can use a web-based one:
+
+- [Webchat](https://webchat.esper.net/?nick=&channels=#mobarena)
+
+Remember, though, that IRC is _idle chat_, which means you likely won't get a 
+response immediately. It could take anything from a couple of seconds to a 
+day, but your message _will_ be seen.
+
+## Bugs and Suggestions
+Found a bug or have a great idea for the plugin? Use the issue tracker here on 
+Github to submit a bug report or feature request. Please have a look through 
+the existing issues before you post a new one to avoid duplicates.