JAL-3210 Added README_GRADLE_JALVIEWJS-2019-10-15.md

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+Last updated: 2019-10-09
+
+# TRANSPILING USING ECLIPSE AS AN EXTERNAL CLI TOOL:
+
+Download and install a clean eclipse-jee-2019-06 (or eclipse-jee-2019-09)
+
+In gradle.properties edit `jalviewjs_eclipse_root` to point to the root dir.
+If you're on a mac, DO NOT include the `Eclipse.app` folder in the path (use the path up to this point, but not the .app folder itself).
+You can use a '~' as the first character which will get replaced with `System.getProperty("user.home")`.
+
+Note that the gradle tasks (`jalviewjsEclipseCopyDropins`) will take care of copying `net.sf.j2s.core.jar` and the `com.seeq.eclipse.importprojects.jar` into the `dropins` and `plugins` dir (on either unix or mac -- not tested on windows yet).
+
+Note that the logs from the transpile go into `build/jalviewjs/` as `j2s-transpile.out` and `j2s-transpile.err`
+
+gradle tasks possibly of interest to you:
+
+
+
+```
+gradle jalviewjs  # (should build the build/jalviewjs/site dir)
+
+gradle jalviewjsSiteTar  # will produce build/distribution/site.tar.gz
+
+gradle jalviewjsTranspile  # should run a new eclipse compile+transpile
+
+gradle jalviewjsServerStart  # will run a localhost http server to allow you to test the site in a browser.  Just use the URL given in the output.  To stop the server you have to do  gradle --stop  or you can just leave it running until the gradle daemon dies.
+```
+
+If it's working okay, you just need to to
+
+```
+gradle jalviewjs
+gradle jalviewjsServer
+```
+
+and go to the localhost URL in the output of the jalviewjsServer task in your web browser (on a mac, just right clicking on the URL in terminal window gives an "Open URL" option which is nice and easy).
+
+