Changes since 4.1:
* Fixed missed initialization of \Gm@lines.
* Fixed a bug that the papersize setting explicitly specified
with \geometry or \usepackage in the preample didn't come to
\newgeometry.
* Added \mag offset adjustment for \newgeometry.
* Added 'onecolumn' option as a shorthand for 'twocolumn=false'.
* Changed the format of the verbose mode.
* Fixed a bug that caused an error in 'pass' option.
* Changing page layout mid-document.
The new commands \newgeometry{...} and \restoregeometry allow
users to change page dimensions in the middle of the document.
* A new set of options to specify the layout area.
The options specified for the area, in which the page dimensions
are calculated, are added: 'layout', 'layoutsize',
'layoutwidth', 'layoutheight' and so forth.
These options would help to print the specified
layout to a different sized paper. For example, with 'a4paper'
and 'layout=a5paper', the geometry package uses 'A5' layout to
calculate margins with the paper size still 'A4'.
* A new driver option 'xetex'.
The new driver option 'xetex' is added. The driver auto-detection
routine has been revised so as to avoid an error with undefined
control sequences. Note that 'geometry.cfg' in TeXLive, which
disables the auto-detection routine and sets 'pdftex', is no
longer necessary and has no problem even though it still exists.
To set 'xetex' is strongly recommended with XeLaTeX.
* New paper size presets for JIS B-series.
The papersize presets 'b0j' to 'b6j' for JIS (Japanese Industrial
Standards) B-series are added.
* Changing default for underspecified margin.
In the previous version, if only one margin was specified,
'bottom=1cm' for example, then geometry set the other margin with
the margin ratio (1:1 by default for the vertical dimensions)
and got 'top'=1cm in this case.
The version 5 sets the text-body size with the default 'scale'
(=0.7) and determine the unspecified margin.
* The option 'showframe' works on every page.
With 'showframe' option, the page frames are shown on every page.
In addition, the new option 'showcrop' would print cropmarks showing
the corners of the layout (the same as paper by default) on every page.
* Loading geometry.cfg precedes processing class options.
The previous version loaded 'geometry.cfg' after processing
the document class options. Now that the config file is
loaded before processing the class options, you can change the
behavior specified in 'geometry.cfg' by adding options into
\documentclass as well as \usepackage and \geometry.
* Deleted options: 'compat2' and 'twosideshift'.
The version 5 has no longer compatibility with the previous ones.
'compat2' and 'twosideshift' are gone for simplicity.
* Fixed check for the definition of \AtBeginShipoutFirst.
* Fixed \topskip adjustment so that it works when "lines" option is used.
* Added "driver=none" option, which does nothing for driver.
* Revised the note on "ifvtex" package.
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