Update galaxy.rst

community_wsgi.ini is now tool_shed_wsgi.ini

likewise run_community.sh is now run_tool_shed.sh

as per https://bitbucket.org/galaxy/galaxy-dist/commits/da3aece419ca2940c4a8a3a059e3bfe25a98098b
Merge pull request #2 from mr-c/patch-2

Update galaxy.rst