Version: use git tag if available

manuscrit/bin/version.sh

@@ -1,5 +1,9 @@
 #!/bin/bash
 
+tag="$(git describe --tags --exact-match 2>/dev/null)"
+if [ "$?" -eq 0 ] ; then
+    echo -n "$tag-"
+fi
 echo -n "$(git rev-parse --short HEAD)"
 if [ -n "$(git status --porcelain --untracked-files=no)" ] ; then
     echo -n "-dirty"