- go test and document has been updated.

- go test updated

- go test updated

- godoc updated

- go test and godoc updated
Signed-off-by: Ri Xu <xuri.me@gmail.com>

- API changed, use worksheet name instead of "sheet" + index, related issue #25, #43, #47, #51, #89, #101, #116 and #120.
- go test updated

- go test and readme update

- go test and godoc updated

- go test added

it support "External" and "Location"
Signed-off-by: NYoungwan Kim <y103.kim@gmail.com>

- go test updated

- go test and godoc updated

- Readme and go test updated

- go test updated

- go test and godoc updated

- New function `NewStyle()` added and function `SetCellStyle()` has been exported, relate issue #72;
- go test and go doc updated

- Unify the index row number index of functions `SetRowHeight()` and `GetRowHeight()` relate issue #68;
- Unify the return value data type of functions  `SetColWidth()` and `GetColWidth()`;
- go test updated

- Support insert new lines into shape, relate issue #38, note that the format set parameter of function `AddShape()` changed;
- go test and go doc updated

- go test updated;
- Fix typo

- go test updated

- go doc and go test updated

- Function `SetCellValue()` support `time.Time` data type parameter, relate issue #49;
- go doc and go test updated

- Drawing `nvPicPr` element ID property calculation changed;
- go test updated

- go test updated

- go test updated