A Excel file writer. Without themes, just data output.
```rust extern crate xlsx;
use xlsx::workbook::Workbook;
let mut w = Workbook::new("tmp/doc1", "Rust");
w.initialize();
let number = w.newformat("#,###,###,##0.00"); let date = w.newformat("dd/mm/yyyy");
let mut s = w.new_worksheet("Sheet 1", 2);
s.cell_txt(w.value("Company Name")); s.row();
s.celltxt(w.value("Title 1")); s.celltxt(w.value("Title 2")); s.celltxt(w.value("Title 3")); s.celltxt(w.value("Title 4")); s.row();
s.cellnum("50.00", number); s.cellnum("1300.00", number); s.celltxt(w.value("20")); s.cellfmt(w.value("23/12/2015"), date); s.flush();
s = w.newworksheet("Sheet 2", 1); s.celltxt(w.value("Other Page")); s.row(); s.cellnum("1", number); s.row(); s.cellfmt(w.value("12/02/1984"), date); s.flush();
w.flush();
w.xlsx("tmp/doc1.xlsx"); ```
My first Rust program. Needs refactoring cause lifetimes nightmares at the start, but it's ok now.