Moving to new OJS setup

[mpolishchuck]

This is a guide how to migrate from OJS 2.4.7 to OJS 3.3.0 (the latest at this moment).

High level plan.

0. Reset current build
   0.1. Switch to init build
   0.2. Remove all builds
1. Sync all files
   1.1. files dir (store, specificed in config)
   1.2. public files (located in webroot, /public directory)
2. Copy db from old OJS installation to new one.
3. Deploy version 3.2.1
4. run php tools/upgrade.php upgrade
5. Deploy version 3.3.0
6. run php tools/upgrade.php upgrade
7. Run necessary database updates (run prepared php script)
8. Adjust ownership/permissions of the following files/dirs
   8.1. files dir
   8.2. /public/journals
   8.3. /public/site
   8.4. /cache
9. Enable instance by changing installed config variable.
10. Enable cron jobs
    10.1. Web cache periodic clean
    10.2. Run scheduled tasks