Added resource plugin, removed pluginManagement element as unnecessary
Added file appender and configured custom logger in log4j.xml
Revert "Added file appender and configured custom logger in log4j.xml"

This reverts commit 5ab7f96a4720e0c876dc5a03350ba812dcd5fcbb.
Revert "Revert "Added file appender and configured custom logger in log4j.xml""

This reverts commit 4fc291177b7918655eecc7b684309ba949315d57.
Deleted accidentally included files
Handle of warnings in Formatter (currently - brace mismatches)
Added simple info message on app start
Improved logging output
Logging formatting warnings info