doc: Redo the pages style, new logo, etc.

Signed-off-by: Cyril Hrubis <metan@ucw.cz>
tests: Makefile: Fix parallel build.

Add missing framework dependency.

Signed-off-by: Cyril Hrubis <metan@ucw.cz>
pywrap: text: Do not wrap GP_Print and GP_VPrint

Python has it's own way of producing formatted strings, moreover trying
to wrap these produces build errors.

Signed-off-by: Cyril Hrubis <metan@ucw.cz>
build: Add --mandir to configure and install.mk

Now spiv is installed by make target rather than by the ugly install.sh
script, also prepare for man page installation.

Signed-off-by: Cyril Hrubis <metan@ucw.cz>