added README

README.md

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+# Sweet Dreams
+
+> A plugin made to enhance sleeping in multiplayer servers.
+
+## Why
+
+I faced a number of times, on my private server, people wanting to sleep, but not everyone was sleeping, so I coded this little plugin.
+
+## How
+
+If a player goes to sleep during the night or a thunderstorm, then the player will skip the night or the thunderstorm for the whole server, after 100 ticks (5 seconds, in vanilla it's 101 ticks).
+
+## Setup or configuration
+
+There's none.