Added gridChart and pushed chart further up the inheritance chart
On branch master

Changes to be committed:

modified:   diagram/__init__.py
modified:   diagram/chart.py
new file:   diagram/entityDiagram.py
modified:   diagram/flowChart.py
new file:   diagram/freeChart.py
modified:   diagram/gridChart.py
new file:   diagram/mindMap.py
new file:   diagram/noChart.py
modified:   diagram/structureChart.py
new file:   rc.bat
modified:   richChart.py