Added helper methods to compare versions

Author: cmaglie

arduino-core/src/cc/arduino/contributions/VersionHelper.java

@@ -64,4 +64,7 @@ public static Version valueOf(String ver) {
     }
   }
 
+  public static int compare(String a, String b) {
+    return valueOf(a).compareTo(valueOf(b));
+  }
 }

arduino-core/src/cc/arduino/contributions/libraries/ContributedLibrary.java

@@ -29,13 +29,14 @@
 
 package cc.arduino.contributions.libraries;
 
-import cc.arduino.contributions.DownloadableContribution;
-import processing.app.I18n;
+import static processing.app.I18n.tr;
 
 import java.util.Comparator;
 import java.util.List;
 
-import static processing.app.I18n.tr;
+import cc.arduino.contributions.DownloadableContribution;
+import cc.arduino.contributions.VersionHelper;
+import processing.app.I18n;
 
 public abstract class ContributedLibrary extends DownloadableContribution {
 
@@ -152,6 +153,10 @@ public boolean equals(Object obj) {
     return versionEquals && nameEquals;
   }
 
+  public boolean isBefore(ContributedLibrary other) {
+    return VersionHelper.compare(getVersion(), other.getVersion()) < 0;
+  }
+
   @Override
   public int hashCode() {
     String hashingData = "CONTRIBUTEDLIB" + getName() + getVersion();