* remove autotools
It seems to all work. I tested with gtk-doc enabled. I probably missed a
few things argh.
* remove some old cruft
* oop, forgot m4/
* remove version check
since we no longer have a wrapper script
can't use GRegexp if we need to support centos5 ... vipsthumbnail was
using it to parse geometry strings
new geo parser, plus some tests
see https://github.com/jcupitt/libvips/issues/622