title: Sbt Unresolved Dependencies (Not a valid command: gen-idea)
body: <p>I'm trying to get sbt to generate Intellij IDEA project files using the sbt-idea plugin as described <a href="https://github.com/mpeltonen/sbt-idea" rel="nofollow">here</a>.</p>
  
  <pre><code>[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
  [warn]  ::          UNRESOLVED DEPENDENCIES         ::
  [warn]  ::::::::::::::::::::::::::::::::::::::::::::::
  [warn]  :: de.undercouch#sbt-docbook-plugin;0.2-SNAPSHOT: not found
  [warn]  ::::::::::::::::::::::::::::::::::::::::::::::
  [warn] 
  [warn]  Note: Some unresolved dependencies have extra attributes.  Check that these dependencies exist with the requested attributes.
  [warn]      de.undercouch:sbt-docbook-plugin:0.2-SNAPSHOT (sbtVersion=0.11.2, scalaVersion=2.9.1)
  [warn] 
  [error] {file:/Users/ndidi/Sandbox/specs2-spring-examples/simple/project/plugins/}default-58af23/*:update: sbt.ResolveException: unresolved dependency: de.undercouch#sbt-docbook-plugin;0.2-SNAPSHOT: not found
  Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? i
  [warn] Ignoring load failure: no project loaded.
  [error] Not a valid command: gen-idea
  [error] gen-idea
  [error]         ^
  </code></pre>
  
  <p>I've gone through the project's issues page and also Googled extensively, however I haven't discovered anyone else with this issue, causing me to believe that the problem is somewhat uncommon and likely to be related to an issue with my setup..</p>
  
  <p>If anyone could shine a little light on this, it'd be most appreciated.</p>
  
  <p>Thanks in advance.</p>