Log Message:
Update to 2.1.1

Changelog:
2.1.1

- Tiny bug fix to make sure that the help file is in the right language.

2.1.0

- Dragging and and dropping files from Windows Explorer, Thunar, etc.,
  now works (at least for me, on Windows 7 and Xubuntu).

- Updated Czech translation from Pavel Fric.

- French translation from Pierre-Alain Bandinelli.

- German translation (and many suggestions) from Rainer Krachten.

- Translations should "just work"; i.e., if you use a French locale then
  the user interface and help text should appear in French. However, you
  can force DiffPDF to use any language it supports by using the
  --language command line option (e.g., --language=fr). If an
  unsupported locale or --language option is used, DiffPDF will fall
  back to English.

- Now support -h as a synonym for --help.

- Initial path defaults to home directory instead of DiffPDF's
  installation directory.

- Improved the Options dialog's layout.

- A subtle bugfix to the --words command line option.

- Fixed a crash: clicking to set a margin when there're no PDFs loaded
  now safely does nothing.

2.0.0

- Can now have comparisons exclude text that's outside user-specified
  margins. This feature was sponsored by a company that prefers to
  remain anonymous.

- Save As can now save images as well as PDFs.

- Minor bug fixes and improvements.

- Command line help (--help) will no longer work on Windows. This is to
  avoid a spurious console window appearing. I've put the output in the
  online help though.

- Improved dock window handling so that docks can now be stacked on top
  of each other (useful for small screens).