Added intltool to dependencies, as I got errors on ./bootstrap without it

./bootstrap gave me the following output without this package:
```
autoreconf: Entering directory `.'
autoreconf: running: intltoolize --automake --copy --force
Can't exec "intltoolize": No such file or directory at /usr/share/autoconf/Autom4te/FileUtils.pm line 345.
autoreconf: failed to run intltoolize: No such file or directory
autoreconf: autopoint is needed because this package uses Gettext
```