GRAS Installation issue

Hi,
I am trying to install grextras and so I tried to clone gras.git
using
the command

git clone GitHub - guruofquality/gras: GRAS: The GNU Radio Advanced Scheduler

there is an error saying fatal:http request failed.

when i tried to access the link directly without using git command it
opened. So i tried to download the zipfile from github and extracted it.
Then I went into the extracted directory and ran
mkdir build
cd build
cmake …/

I am getting an error saying
Make Error at CMakeLists.txt:14 (message):

submodule Theron does not exist!!

Did you remember to run the following commands?

  git submodule init
  git submodule update

Call Stack (most recent call first):
CMakeLists.txt:23 (GRAS_CHECK_SUBMODULE)

– Configuring incomplete, errors occurred!

Now i try to run git submodule init and from wherever i run i get this
error saying:

You need to run this command from the top level of the working
directory. I
tried from different locations like from build,from gras-master. But i
keep
getting the same error. Can you tell me how to sort this issue. I am
using
gnuradio 3.6.3 on ubuntu 12.04