tidyxl 0.2.3

Imports dates on or before 1900-02-28 dates correctly, and only warns on the impossible date 1900-02-29, returning NA (following readxl).
Fixes subsecond rounding (following readxl (fixes #14))
Imports styles correctly from LibreOffice files (interprets 'true' and 'false'
as booleans, as well as the 0 and 1 used by Microsoft Excel, and defaults to
'true' when not present, e.g. applyFill)
Fixes a bug that caused some LibreOffice files to crash R, when styles were
declared with gaps in the sequence of xfIds.
Imports comments attached to blank cells (fixes #10)
Includes the sheet and cell address in warnings of impossible datetimes from
1900-02-29.

tidyxl 0.2.1.9000

Checks the value of the date1904 attribute for "false" or "1" to support files
created by the openxlsx package (#8).
Fixed a bug that only imported the first line of multiline comments (#9).
Encodes cell and comment text as UTF-8 (#12).
Finds worksheets more reliably in files not created by Excel (part of #13).
Falls back to default styles when none defined (#13).
Imports dates with greater precision (part of #14).
Fixed the order of worksheets (#15)

Fixed a major bug: dates were parsed incorrectly because the offsets for the
1900 and 1904 systems were the wrong way around.
Added a warning when dates suffer from the Excel off-by-one bug.
Fixed a bug that misinterpreted some number formats as dates (confused by the
'd' in '[Red]', which looks like a 'd' in 'd/m/y'.)
Added support for xlsx files created by Gnumeric (a single, unnamed cell
formatting style).
Fixed the checkUserInterrupt to work every 1000th cell.
Added many tests.
Removed lots of redundant code.