fixed cell display and input line display to show the right values
The input line inserts to cells, thought I found a bug in cell selection
Fixed an improper selection bug.
Added icons that will be used for the buttons
created button panel and added the buttons to view
Implemented button pressing to print to console
Pressing buttons fires a property change which is picked up by the gui.
implemented a file chooser dialog box and added a custom CSV filter
Implemented save saveAs and load, to reuse the jfilechooser dialog.
simplified code, for save. The save as is same as a save at the gui
level, but different at the buttoncomponent level.
saving files works.
Added create new icon
Fixed bug where the table wouldn't update until selection changed. table
now updates as soon as enter is pressed in the input line
Implemented create new spreadsheet
Added commenting.
Merge branch 'GUI'

Conflicts:
	src/ui/Gui.java
	src/ui/InputLineComponent.java
	src/ui/SpreadSheet.java