PEP-8 cleanups for lib/galaxy/tools/actions/upload_common.py.
PEP-8 cleanups of lib/galaxy/security/__init__.py.
Break up row_for_param in tool_form.mako into smaller pieces.
Add HTML class to tool select elements corresponding to data parameters.

This will allow targetted enhancing of them via JavaScript.
Break up tools.handle_input - split out param checking.
Break up tools.handle_input - split out state creation.
Break up tools.handle_input - split out refresh state logic.
Break up tools.handle_input - split out page advance logic.
Break up tools.handle_input - split out actual tool execution intiation.
WIP: Allow users to run tools in parallel across many datasets.