add automatic testing project
* add display excel test cases
* add formula test cases
* use hamcrest-library to compare double (isCloseTo())
* refine formula test to be more complete
update formula test case
* use another way to determine end of formulas
* add more test case
* add custom formula
* add custom formula
add comments for formula test
Because the specification of color is unclear, we don't test
color-related feature. (comment out those color-related test cases)
Organize test case by feature
minor refine cell border.
add a test case for the sheet "cell-data"
add test cases for the sheet "cell-reference"
refine test cases' comment
add a test case for freezing and hiding rows and columns.
* fix getFont() bug
* move some utility methods to base class
* add test for "cell-data", "chart-image"
* add SpreadsheetAgent to simulate user actions.
* rename methods of SpreadsheetTestCaseBase
* add a test case for "sheet-autofilter"
add a test case for the sheet "sheet-protection"
* make display excel test run for 2007 and 2003
* add test page and data for Excel 2003
add 2003 formula test data