add helper class for nodes and change the nodes package structure

...main/java/com/joelhelkala/watcherGui/Nodes/Node/Node.java

.../joelhelkala/watcherGui/Nodes/Node/NodeData/NodeData.java

...src/main/java/com/joelhelkala/watcherGui/Nodes/Nodes.java

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

.../joelhelkala/watcherGui/frames/panels/LineChartPanel.java

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

...elkala/watcherGui/frames/subframes/NodeSettingsFrame.java

...com/joelhelkala/watcherGui/httpRequests/HttpRequests.java