title: Maven Build Failure when calling mvn without lifecycle phase or goal
body: <p>Am try to build my project using Maven on Eclipse. The first build was awesome. After that I get this error :</p>
  
  <pre><code>SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
  SLF4J: Defaulting to no-operation (NOP) logger implementation
  SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
  [INFO] Scanning for projects...
  [INFO] ------------------------------------------------------------------------
  [INFO] BUILD FAILURE
  [INFO] ------------------------------------------------------------------------
  [INFO] Total time: 0.129s
  [INFO] Finished at: Wed Nov 28 17:51:35 GST 2012
  [INFO] Final Memory: 2M/121M
  [INFO] ------------------------------------------------------------------------
  [ERROR] No goals have been specified for this build. You must specify a valid lifecycle
  phase or a goal in the format &lt;plugin-prefix&gt;:&lt;goal&gt; or &lt;plugin-group-id&gt;
  :&lt;plugin-artifact-id&gt;[:&lt;plugin-version&gt;]:&lt;goal&gt;. Available lifecycle phases are: validate,
  initialize, generate-sources, process-sources, generate-resources, process-resources,
  compile, process-classes, generate-test-sources, process-test-sources,
  generate-test-resources, process-test-resources, test-compile, process-test-classes, test,
  prepare-package, package, pre-integration-test, integration-test, post-integration-test,
  verify, install, deploy, pre-site, site, post-site, site-deploy, pre-clean, clean,
  post-clean. -&gt; [Help 1]
  [ERROR] 
  [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
  [ERROR] Re-run Maven using the -X switch to enable full debug logging.
  [ERROR] 
  [ERROR] For more information about the errors and possible solutions, please read the
  following articles:
  [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoGoalSpecifiedException
  </code></pre>