v2.0.4.1

Changes

• Sources of me.botsko:elixr dependency included into repository. Since original maven repository was down.
• Make project buildable.
• Speedup mysql batch inserts.
• Remove warnings about SSL when connecting to mysql.
• Fix mysql connection leaks.
• Disable RemoveAbandoned mysql setting. It harms when database has lots of data and query
  lasts too long thus triggering unwanted connection closing.