added abp examples & example-properties

src/main/java/com/ardublock/ui/OpenblocksFrame.java

src/main/resources/com/ardublock/block/ardublock.properties

...ain/resources/com/ardublock/block/ardublock_de.properties

.../resources/com/ardublock/block/ardublock_en_GB.properties

...ain/resources/com/ardublock/examples/AnalogReadSerial.abp

src/main/resources/com/ardublock/examples/ButtonLED.abp

...main/resources/com/ardublock/examples/CounterVariable.abp

...in/resources/com/ardublock/examples/DigitalReadSerial.abp

...esources/com/ardublock/examples/DigitalVariableToggle.abp

...ain/resources/com/ardublock/examples/WhileButtonBlink.abp