add .gitignore

add a .gitignore to reduce noise in git status etc.

.gitignore

@@ -0,0 +1,98 @@
+Makefile.in
+*.o
+*.lo
+*.la
+*.pc
+.deps
+.libs
+aclocal.m4
+config.*
+configure
+depcomp
+autom4te.cache/
+doc/reference/gtk-doc.make
+doc/reference/libvips-docs.sgml
+install-sh
+libtool
+libvips/include/vips/version.h
+fred
+ltmain.sh
+m4/
+missing
+mkinstalldirs
+po/Makefile.in.in
+po/POTFILES
+po/de.gmo
+py-compile
+stamp-h1
+swig/python/setup.py
+swig/vipsCC/VDisplay.py
+swig/vipsCC/VError.py
+swig/vipsCC/VImage.h
+swig/vipsCC/VImage.py
+swig/vipsCC/VMask.py
+swig/vipsCC/vdisplaymodule.cxx
+swig/vipsCC/verrormodule.cxx
+swig/vipsCC/vimagemodule.cxx
+swig/vipsCC/vmaskmodule.cxx
+tools/iofuncs/edvips
+tools/iofuncs/header
+tools/iofuncs/vips
+tools/iofuncs/vipsthumbnail
+tools/mosaicing/find_mosaic
+tools/mosaicing/mergeup
+tools/other/cooc
+tools/other/cooc_features
+tools/other/glds
+tools/other/glds_features
+tools/other/simcontr
+tools/other/sines
+tools/other/spatres
+tools/other/squares
+tools/scripts/batch_crop
+tools/scripts/batch_image_convert
+tools/scripts/batch_rubber_sheet
+tools/scripts/light_correct
+tools/scripts/shrink_width
+
+# we can't ignore all Makefile since we have a couple of hand-made ones
+Makefile
+doc/Makefile
+doc/reference/Makefile
+libvips/Makefile
+libvips/acquire/Makefile
+libvips/arithmetic/Makefile
+libvips/boolean/Makefile
+libvips/cimg/Makefile
+libvips/colour/Makefile
+libvips/conversion/Makefile
+libvips/convolution/Makefile
+libvips/deprecated/Makefile
+libvips/format/Makefile
+libvips/freq_filt/Makefile
+libvips/histograms_lut/Makefile
+libvips/include/Makefile
+libvips/include/vips/Makefile
+libvips/inplace/Makefile
+libvips/iofuncs/Makefile
+libvips/mask/Makefile
+libvips/morphology/Makefile
+libvips/mosaicing/Makefile
+libvips/other/Makefile
+libvips/relational/Makefile
+libvips/resample/Makefile
+libvips/video/Makefile
+libvipsCC/Makefile
+libvipsCC/include/Makefile
+libvipsCC/include/vips/Makefile
+man/Makefile
+po/Makefile
+swig/Makefile
+swig/vipsCC/Makefile
+tools/Makefile
+tools/iofuncs/Makefile
+tools/mosaicing/Makefile
+tools/other/Makefile
+tools/scripts/Makefile
+
+