plug-ins: improve Makefile.am of python/ subdir.

The old rules were crap and basically copying the scripts in build
folder before installing. Get proper/simpler rules.

plug-ins/python/Makefile.am

@@ -3,61 +3,31 @@
 SUBDIRS = \
 	python-console
 
-pluginexecdir = $(gimpplugindir)/plug-ins
+palette_offsetdir = $(gimpplugindir)/plug-ins/palette-offset
+palette_offset_SCRIPTS = palette-offset.py
 
-source_scripts = \
-##	colorxhtml.py			\
-##	file-openraster.py		\
-##	foggify.py			\
-##	gradients-save-as-css.py	\
-##	histogram-export.py     	\
-	palette-offset.py		\
-##	palette-sort.py			\
-	palette-to-gradient.py
-##	py-slice.py			\
-##	python-eval.py			\
-##	spyro_plus.py			\
-##					\
-##	benchmark-foreground-extract.py	\
-##	clothify.py			\
-##	shadow_bevel.py			\
-##	sphere.py			\
-##	whirlpinch.py
+palette_to_gradientdir = $(gimpplugindir)/plug-ins/palette-to-gradient
+palette_to_gradient_SCRIPTS = palette-to-gradient.py
 
-scripts = \
-##	colorxhtml/colorxhtml.py			\
-##	file-openraster/file-openraster.py		\
-##	foggify/foggify.py				\
-##	gradients-save-as-css/gradients-save-as-css.py	\
-##	histogram-export/histogram-export.py     	\
-	palette-offset/palette-offset.py		\
-##	palette-sort/palette-sort.py			\
-	palette-to-gradient/palette-to-gradient.py
-##	py-slice/py-slice.py				\
-##	python-eval/python-eval.py			\
-##	spyro_plus/spyro_plus.py
-
-#test_scripts = \
-#	benchmark-foreground-extract/benchmark-foreground-extract.py	\
-#	clothify/clothify.py						\
-#	shadow_bevel/shadow_bevel.py					\
-#	sphere/sphere.py						\
-#	whirlpinch/whirlpinch.py
-
-$(scripts) $(test_scripts): $(source_scripts)
-	$(AM_V_GEN) mkdir -p $(@D) && cp -f "$(srcdir)/$(@F)" $@
-
-nobase_pluginexec_SCRIPTS = $(scripts)
+# TODO: to be ported:
+##	colorxhtml.py
+##	file-openraster.py
+##	foggify.py
+##	gradients-save-as-css.py
+##	histogram-export.py
+##	palette-sort.py
+##	py-slice.py
+##	python-eval.py
+##	spyro_plus.py
 
 if GIMP_UNSTABLE
-nobase_pluginexec_SCRIPTS += $(test_scripts)
+##	benchmark-foreground-extract.py
+##	clothify.py
+##	shadow_bevel.py
+##	sphere.py
+##	whirlpinch.py
 endif
 
-EXTRA_DIST = \
-	$(source_scripts)
-
-CLEANFILES = $(scripts) $(test_scripts)
-
 # Python interpreter file.
 
 pyinterpdir = $(gimpplugindir)/interpreters