added ignore for .class files
remove bin folder
ignore test.vc temp file
NON-STABLE BUILD - Refactoring in classes: {Continuous/Discrete AttributeDomain, ChartEntry}; Added new class ChartData to keep track of data in ValueCharts; Updated several classes to reference AttributeData/Domain by attribute name rather than keeping an instance of the data; Added keep state function in ValueChart with deep copying of ChartData; Allow cancel in ConstructionView to work without requiring new ValueChart instance; Add HashMaps of <name, object> in some classes to enable lookup by name;