reworked version management

(version can be set by gradle now. e.g. "./gradlew
-PprojectVersion=0.2.3 clean daily")

build.gradle

@@ -16,7 +16,6 @@ import org.apache.tools.ant.filters.FixCrLfFilter
 import org.apache.tools.ant.filters.ReplaceTokens
 
 group = 'it.unibz.inf.isochrone'
-version = '0.2.2-SNAPSHOT'
 
 description = 'PhD project of Nikolaus Krismer'
 sourceCompatibility=1.7
@@ -29,15 +28,18 @@ def getDate() {
 }
 
 ext {
-	defaultVersion = '0.1-SNAPSHOT'
+	defaultVersion = '0.2.2-SNAPSHOT'
 	isRelease = false
 }
 
-if (version.equalsIgnoreCase('unspecified')) {
-	version = defaultVersion
-} else if (!version.matches(~/[0-9\.]*(-SNAPSHOT)?/)) {
-	println "Invalid version number '$version' given. Falling back to default!"
-	version = defaultVersion
+if (project.hasProperty('projectVersion')) {
+	version = projectVersion
+	if (!version.matches(~/[0-9\.]*(-SNAPSHOT)?/)) {
+		println "Invalid version number '$version' given. Falling back to default!"
+		version = defaultVersion
+	}
+} else {
+	version = defaultVersion;
 }
 
 if (version.endsWith('-SNAPSHOT')) {