created abstract class for panels and value updates to panels

...i/src/main/java/com/joelhelkala/watcherGui/Node/Node.java

...va/com/joelhelkala/watcherGui/Node/NodeData/NodeData.java

...n/java/com/joelhelkala/watcherGui/frames/WelcomePage.java

...lhelkala/watcherGui/frames/panels/AbstractValuePanel.java

...m/joelhelkala/watcherGui/frames/panels/HumidityPanel.java

...joelhelkala/watcherGui/frames/panels/LuminosityPanel.java

...oelhelkala/watcherGui/frames/panels/TemperaturePanel.java

...oelhelkala/watcherGui/frames/subframes/NodeDataFrame.java