Update signal handler fix for newer numpy/Anaconda version (#44)

* Update signal handler fix for newer numpy/Anaconda version

* Explain changes in comments

climin/__init__.py

 from __future__ import absolute_import
 
-# What follows is part of a hack to make control breaking work on windows even
-# if scipy.stats ims imported. See:
+# Control breaking does not work on Windows after e.g. scipy.stats is
+# imported because certain Fortran libraries register their own signal handler
+# See:
 # http://stackoverflow.com/questions/15457786/ctrl-c-crashes-python-after-importing-scipy-stats
+# and https://github.com/numpy/numpy/issues/6923
 import sys
 import os
 import imp
 import ctypes
 
 if sys.platform == 'win32':
+    # For setups where Intel Fortran compiler version >= 16.0 (This is the case
+    # for Anaconda version 4.1.5 which comes with numpy version 1.10.4) is used,
+    # the following flag allows to disable the additionally introduced signal
+    # handler, older versios make no use of this environment variable
+    env = 'FOR_DISABLE_CONSOLE_CTRL_HANDLER'
+    if env not in os.environ:
+        os.environ[env] = '1'
+    # In setups with an older version, ensuring that the respective dlls are
+    # loaded from the numpy core and not somewhere else (e.g. the Windows System
+    # folder) helps
     basepath = imp.find_module('numpy')[1]
-    ctypes.CDLL(os.path.join(basepath, 'core', 'libmmd.dll'))
-    ctypes.CDLL(os.path.join(basepath, 'core', 'libifcoremd.dll'))
+    # dll loading fails when Intel Fortran compiler version >= 16.0, therefore
+    # use try/catch
+    try:
+        ctypes.CDLL(os.path.join(basepath, 'core', 'libmmd.dll'))
+        ctypes.CDLL(os.path.join(basepath, 'core', 'libifcoremd.dll'))
+    except Exception:
+        pass
 
 from .adadelta import Adadelta
 from .adam import Adam