Add a script to pull in Third_Party on the Mac. Refs #3977

Code/fetch_Third_Party.sh

+#! /bin/bash
+# This script deals with getting hold of the required third party includes and libraries
+# It will either clone or pull 3rdpartyincludes & 3rdpartylibs-mac and put them in the right place for CMake
+
+gitcmd=`which git`
+arch=mac
+
+if [ -z "${gitcmd}" ]; then
+    echo 'Unable to find git, check that it is installed and on the PATH'
+    exit 1
+fi
+
+function update {
+    # Just making sure what we have is up to date
+    echo Updating Third_Party includes and libraries...
+    cd Third_Party/include
+    ${gitcmd} pull
+    cd ../lib/${arch}
+    ${gitcmd} pull
+    # Be sure to end up back where we started
+    cd ../../..
+    exit 0
+}
+
+function clone {
+    echo Cloning Third_Party includes and libraries...
+    # Find out the url where mantid came from so we use the same location & protocol
+    url=`git config --get remote.origin.url | sed -e 's@/mantid.git@@'`
+    echo "mantidproject URL set to ${url}"
+    incs=${url}/3rdpartyincludes.git
+    echo "URL for includes set to ${incs}"
+    libs=${url}/3rdpartylibs-mac.git
+    echo "URL for libraries set to ${libs}"
+    ${gitcmd} clone ${incs} Third_Party/include
+    ${gitcmd} clone ${libs} Third_Party/lib/mac64
+    exit 0
+}
+
+# First check if everything is already there - if so we just want to update
+if [ -d Third_Party/include ]; then
+    update
+else
+    clone
+fi
+
+