Python soft IOC: Convert README to github format

It's still not great and is too tied to the Diamond environment, but at
least it's a start.

git-svn-id: svn+ssh://serv0002.cs.diamond.ac.uk/home/subversion/repos/controls/diamond/trunk/support/pythonSoftIoc@113229 e099a375-04f9-0310-9d5f-a741eaff62e1
Python soft IOC: Trivial documentation change

git-svn-id: svn+ssh://serv0002.cs.diamond.ac.uk/home/subversion/repos/controls/diamond/trunk/support/pythonSoftIoc@113230 e099a375-04f9-0310-9d5f-a741eaff62e1