Morphium V4.2.8 released

Morphium V4.2.8 was released including the following features:

• FEATURE:basic support for Aggregation with the InMemoryDriver using Expr
• FEATURE: Support for Expr in Qureries
• FIX: imrpvoved Support for sharding
• FIX: increased InMemoryDriver's thread safety
• FIX: improved tests, reduced side effects
• FIX: CachSynchronizer could cause a message storm in certain circumstances
• FIX: set(Entity e, String Field, Object value, boolean upsert, Callback) does not need a multple parameter, does not make sense
• IMPROVEMENT: increased number of tests to >900
• IMPROVEMENT: refactoring of auto variable handling in MorphiumWriterImpl
• IMPROVMENT: better error handling for index creation during startup
• IMRPOVEMENT: code improvements for increased readablility, stability and/or performance. Added a couple of convenience Methods

morphium V4.2.8 is available on maven central, or on github.