Version 0.3 release candidate 1 release

• Better performance
• AV program caching for speedup same checks
• Better multi-threading synchronization
• XML REST configuration migrated to Java config
• DB logging service prototype
• Use development Docker containers on Travis CI
• Changed logging implementation to Logback for better Logstash connection
• Updated external libraries versions
• One configuration property file for the whole application
• Performance tests
• Reference implementation of AMQP client
• Implementation of a message converter with Spring
• Virus info string in a message is now much more standardized