R: generate version string instead of taking VERSION file.

This is because if you forgot to run ../../bootstrap.sh, then
the version string of the R package was incorrect.

bootstrap.sh

@@ -2,7 +2,7 @@
 
 ## Find out our version number, need git for this
 printf "Finding out version number/string... "
-git describe HEAD --tags | rev | sed 's/g-/./' | sed 's/-/+/' | rev > VERSION
+tools/getversion.sh > VERSION
 cat VERSION
 
 for i in glibtoolize libtoolize; do

interfaces/R/Makefile

@@ -1,5 +1,5 @@
 
-VERSION=$(shell ./tools/convertversion.sh ../../VERSION)
+VERSION=$(shell ./tools/convertversion.sh)
 DATAVERSION=0.1
 top_srcdir=../..
 

interfaces/R/tools/convertversion.sh

@@ -1,6 +1,6 @@
 #! /bin/sh
 
-vstring=`cat ../../VERSION`
+vstring=`../../tools/getversion.sh`
 if echo "$vstring" | grep -q '\+'; then
     pvstring=`echo $vstring | 
          sed 's/\(^[0-9\.]*\)[^+]*[+]*\([0-9][0-9]*\)\.\([0-9a-f]*\)$/\1|\2|\3/'`

tools/getversion.sh

@@ -0,0 +1,3 @@
+#! /bin/sh
+
+git describe HEAD --tags | rev | sed 's/g-/./' | sed 's/-/+/' | rev