Merge pull request #22 from svennb/master

svennb's Maven 3 and separate modules for Scala binaries
Merge pull request #27 from Atry/master

Workaround for continuations.
Maven 3.x is now ok.
Revert maven-scala-plugin's setting to support mixed scala/java, so the java file org.netbeans.modules.scala.editor.ScalaLanguage will be compiled.
Fixed dependency between libs.scala.compiler and libs.scala.continuations.
Fixed http://netbeans.org/bugzilla/show_bug.cgi?id=205859, from tzezula's patch.
Upgraded to NetBeans 7.1
Added spec version for some modules.
Instruction to prevent installed nbscala cluster be used when 'mvn nbm:run-ide'
More clear instruction for copy of netbeans installation.
Got back dependency on tools.jar when necessary.
More code template
Removed system scope for som.sun:tools
Tried to fix:  Module dependency has friend dependency on org.netbeans.modules.java.preprocessorbridgebut is not listed as friend
cleanup
Integrated all local jar installtion to project libs.local.
Added two more 'provider' scope dependencies.
README improved by Oliver Günther
Enhenced README from Oliver Günther
Simplify 'nb.installation' setting.