Permit plugin downgrade if framework downgrade

Author: tomgreenfield

lib/bowermanager.js

@@ -202,12 +202,14 @@ BowerManager.prototype.installLatestCompatibleVersion = function (pluginName, ca
                   }
                   var installedPlugin = results[0];
                   var version = latestInfo.versions[index];
-                  if (installedPlugin && semver.gte(installedPlugin.version, version)) {
+                  if (installedPlugin &&
+                    semver.gte(installedPlugin.version, version) &&
+                    semver.satisfies(installedFrameworkVersion, installedPlugin.framework)) {
                     return callback('Skipping as no newer compatible version found');
                   }
                   self.installPlugin(pluginName, version, callback);
                 });
-              });
+                });
             });
           });
         });