PDF: add notice after cover

Add notice after cover for copyright, Creative Commons licence, and website URL.

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>
PDF: add page number

Insert page number in footer.

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>
Change logo

- change logo to logo showing version control system
- add larger logo for PDF cover

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>
Welcome page: remove unsupported formats

Only support HTML, PDF and EPUB outputs.

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>
Makefile remove unsupported output formats

- only support HTML, PDF and EPUB outputs
- remove unsupported recipes from Makefile

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>
README: edit prerequisites

Specify Debian 7 as only supported platform, though the project should build on
other distributions
Remove make.bat

Remove make.bat as inline conditional text works only on GNU/Linux.

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>