A C library for creating Excel XLSX files

Libxlsxwriter is a C library that can be used to write text, numbers,
formulas and hyperlinks to multiple worksheets in an Excel 2007+ XLSX
file. It supports features such as:

* 100% compatible Excel XLSX files.
* Full Excel formatting.
* Merged cells.
* Defined names.
* Autofilters.
* Charts.
* Data validation and drop down lists.
* Worksheet PNG/JPEG images.
* Memory optimization mode for writing large files.
* Source code available on GitHub.
* FreeBSD License.
* ANSI C.
* Works with GCC, Clang, Xcode, MSVC 2015, ICC, TCC, MinGW,
  MingGW-w64/32.
* Works on Linux, FreeBSD, OpenBSD, OS X, iOS and Windows. Also works on
  MSYS/MSYS2 and Cygwin.
* Compiles for 32 and 64 bit.
* Compiles and works on big and little endian systems.
* The only dependency is on zlib.
