Generalise rule for building .tab.txt files. This helps build off project files.
--- a/Makefile Wed Sep 28 21:02:57 2016 +0300
+++ b/Makefile Wed Sep 28 21:14:27 2016 +0300
@@ -413,7 +413,7 @@
dist/srs/gadict_en-ru+uk.tab.txt: gadict_en-ru+uk.gadict py/gadict.py py/gadict_srs_tab.py $(MAKEFILE_LIST) | dist/srs/
python3 -B py/gadict_srs_tab.py $< $@ ru,uk
-dist/srs/gadict_voa.tab.txt: gadict_voa.gadict py/gadict.py py/gadict_srs_tab.py $(MAKEFILE_LIST) | dist/srs/
+dist/srs/%.tab.txt: %.gadict py/gadict.py py/gadict_srs_tab.py $(MAKEFILE_LIST) | dist/srs/
python3 -B py/gadict_srs_tab.py $< $@
dist/srs/: