packages qt qtbase: install pkgconfig files in standard location
disable stl for wxWidgets as it seems to be very problematic:

http://www.wxwidgets.org/docs/faqgen.htm#stl
Makefile and docs: add EXCLUDE_PKGS and show*deps* functionality
new package libftdi1
update package pkgconf
Merge pull request #226 from abma/master

disable stl for wxWidgets as it seems to be very problematic:
Merge pull request #229 from uwehermann/libftdi1

new package libftdi1
package gdk-pixbuf: explicitly call aclocal and automake
Merge pull request #230 from koneu/master

package gdk-pixbuf: explicitly call aclocal and automake
add optional native autotools bison cmake flex libtool packages
packages automake libtool: fix deps for native builds
Revert "update package pkgconf"

This reverts commit 68a73a314cbef967e5122e21c7b8e1fac8f59f49.
add config.guess to tools so its available prior to any package builds
Makefile: add BUILD variable and add to target loop and PATH
package libtool: separate binary from library (new package libltdl)
add package m4 for native build
native packages: tidy up and install to BUILD prefix to avoid conflicts
packages graphicsmagick guile imagemagick sox: change libtool --> libltdl
Makefile: remove TARGET dependencies on BUILD - keep optional for time being
package graphicsmagick: temporary workaround for pkgconf