Core-446 Refactor plugins package name - adapted pom.xml to 5.6 version
Fix #Core-429 Update copyright date in source files header
Core-433 Some adjustments to Info box
First draft revision of i2c support under RaspberryPI using pi4j
 - TODO: find a way of uniformly access different device types
 - TODO: support missing vendors/chips
 - TODO: rearrange plugin code for above features
I2C: arranged uniform access for digital I/O
 - devices and lines configuration
 - commands
 - notifications