gmp dependency moved away

[rngadam]

Downloading:ftp://ftp.gmplib.org/pub/gmp/gmp-5.1.1.tar.bz2 to:cgaljs/build/gmp/downloads/gmp-5.1.1.tar.bz2
Traceback (most recent call last):
  File "build_all.py", line 22, in <module>
    build_component(component, INCLUDES_DIR, LIBS_DIR)
  File "cgaljs/tools/build.py", line 21, in build_component
    download_tarballs(component.DOWNLOADS, working_dir)
  File "cgaljs/tools/build.py", line 91, in download_tarballs
    download_file_path = download(download_url, get_download_dir(working_dir))
  File "cgaljs/tools/utils.py", line 17, in download
    u = urllib2.urlopen(url)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 431, in open
    response = self._open(req, data)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 449, in _open
    '_open', req)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1412, in ftp_open
    fw = self.connect_ftp(user, passwd, host, port, dirs, req.timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1434, in connect_ftp
    persistent=False)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib.py", line 875, in __init__
    self.init()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib.py", line 884, in init
    self.ftp.connect(self.host, self.port, self.timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ftplib.py", line 135, in connect
    self.sock = socket.create_connection((self.host, self.port), self.timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 575, in create_connection
    raise err
urllib2.URLError: <urlopen error ftp error: [Errno 60] Operation timed out>

correct URL seems to be:

https://ftp.gnu.org/pub/gnu/gmp/gmp-5.1.1.tar.bz2