Check for octave in configure script broken

[andreas-bulling]

Hi,

I run into problems while trying to compile shogun from source and include support for the octave_static interface with the most recent Octave 3.6.1.
The test in the configure script didn't work properly. I've used the following instead (from line 4156):

[...]
if octave --no-history -v >/dev/null 2>&1
then
_octave_version="octave --no-history -v | grep version | cut -f 4- -d ' '"
if test "echo $_octave_version | cut -f 1 -d '.'" -ge 3
[...]