- Make function `TitleToNumber()` exportable, note that function `ToAlphaString()` return value calculation changes, get more info from go doc. Relate issue #63;
- Readme and go doc updated

- Add a donation link, related issue #57  ^_^

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

- go test updated

- Readme updated;
- go test update

- Doc for function `GetRows()` updated, relate issue #43;
- Fix doc typo in `xmlContentTypes.go`;
- Default template updated;
- Readme updated;
- go test updated

- Optimize deserialization operations;
- README updated, add go version required notice

- Improved performance when reading large files, call Token to read tokens one by one instead Unmarshal. Related issue #20 ;
- Fix go test typo;
- Update README

- Character limits for cells added;
- Update go test and fix typo

- go test updated;
- fix typo and `gofmt -s` formatted

added missing imports

Adding more realistic error handling in examples

Open file error return added and UpdateLinkedValue function added to fix linked values within a spreadsheet are not updating.

1) Update readme file credits and go report badge added; 2) Remove use less function; 3) Update test file.

- Optimisation code use fmt package
- Update README
- Remove useless function