Add 3.5.0 release note
+3.5.0 (2020.07.30)
+==================
+* New Feature
+ * Server mode agent
+ * Legacy nGrinder agents must be accessible to nGrinder controller via TCP, it was difficult to set up a private agents to connect to the controller behind a firewall. Now, nGrinder provides the server mode agent. You can easily connect the private agent to the nGrinder controller behind a firewall with the server mode agent.
+ * See https://github.com/donggyu04/ngrinder/wiki/Server-Mode-Agent
+ * GitHub script storage
+ * nGrinder is a SVN server itself to manage test scripts. SVN is very suitable for nGrinder, but it is an old technology. So, we added github as another script storage.
+ * See https://github.com/donggyu04/ngrinder/wiki/GitHub-script-storage
+ * Support MySQL
+ * Since 3.5.0, we support MySQL for main database and fade out Cubrid.
+ * We provide cubrid to mysql migration script.
+ * See https://github.com/donggyu04/ngrinder/wiki/MySQL-migration
+ * Improve test restart time
+ * Improve test restart time by caching test resources.
+ * Until previous version, nGrinder agent dosen't cache test lib & resources. So, if you run test that has large amount of resources, each test takes a long preparation time. From nGrinder 3.5.0, the agent caches test resources ran before and the controller sends only non-cached resources to agent.
+ * Fade out nGrinder-recorder
+ * nGrinder-recorder is no longer supported.
+ * Introducing Gradle
+ * From now, we use Gradle 6.3 as a build system.
+ * New options for perftest
+ * Multi user defined statistic
+ * User can define multiple custom statistic.
+ * See https://github.com/donggyu04/ngrinder/wiki/Multiple-user-defined-statistic-in-nGrinder
+ * Ignore error count
+ * Some of users want to continue testing even if there were many errors in the test. so we support that by test option.
+ * You can find this option in advanced configuration.
+ * Custom classpath
+ * If you want to set classpath for test scripts, you can use this.
+ * See https://github.com/donggyu04/ngrinder/wiki/Custom-classpath
+
+* Modernize
+ * Back-end
+ * Spring boot
+ * Change from spring framework 4 to spring boot 2.
+ * Remove embedded Jetty.
+ * Hazelcast
+ * Use Hazelcast to share data among clusters
+ * Reduce load of database.
+ * Front-end
+ * Vue.js
+ * Introduce SPA for imporve responsibility & usability.
+ * Use webpack as module bundler.
+ * UX/UI
+ * Use Billboard.js to drawing chart.
+ * Bump bootstrap up from 2 to 4.
+
+* Bug fix
+ * #490 Fix log file name for agent command line
+ * #558 Fix agent state API to work in private agent
+ * #571 Prevent zombie agents from remaining in distributed cache
+ * #581 Set default locale to "en" when fail to detect user locale
+ * #587 Handle case of no sampling model
+ * #597 Fix log replacement to hide home path correctly
+
3.4.4 (2020.01.17)
==================
> nGrinder 3.4.4
