Change SDK/DartEditor versioning scheme to semantic versions.

dart/editor/tools/features/com.google.dart.tools.deploy.feature_releng/build.properties

 ###############################################################################
 # Copyright (c) 2003, 2011 IBM Corporation and others.
 # All rights reserved. This program and the accompanying materials
 # are made available under the terms of the Eclipse Public License v1.0
 # which accompanies this distribution, and is available at
 # http://www.eclipse.org/legal/epl-v10.html
 #
 # Contributors:
 #     IBM Corporation - initial API and implementation
 #     Compuware Corporation - Sebastien Angers <sebastien.angers@compuware.com> 
@@ skipping 158 matching lines @@
 buildId=dart-editor
 
 # Label for the build.  Used in naming the build output
 buildLabel=${buildType}.${buildId}
 
 # Timestamp for the build.  Used in naming the build output
 timestamp=007
 
 #The value to be used for the qualifier of a plugin or feature when you want to override the value computed by pde.
 #The value will only be applied to plugin or features indicating build.properties, qualifier = context 
-forceContextQualifier=r${build.revision}
+forceContextQualifier=@VERSION_QUALIFIER@
 
 #Enable / disable the generation of a suffix for the features that use .qualifier. 
 #The generated suffix is computed according to the content of the feature   
 #generateFeatureVersionSuffix=true
 
 ############# BASE CONTROL #############
 # Settings for the base Eclipse components and Java class libraries 
 # against which you are building.
 # Base location for anything the build needs to compile against.  For example,
 # in most RCP app or a plug-in,  the baseLocation should be the location of a previously
@@ skipping 95 matching lines @@
 # Extra arguments for the compiler. These are specific to the java compiler being used.
 compilerArg=-g -nowarn
 
 # Default value for the version of the source code. This value is used when compiling plug-ins that do not set the Bundle-RequiredExecutionEnvironment or set javacSource in build.properties
 javacSource=1.6
 
 # Default value for the version of the byte code targeted. This value is used when compiling plug-ins that do not set the Bundle-RequiredExecutionEnvironment or set javacTarget in build.properties.
 javacTarget=1.6