manual: - adding aggregate passing and returning info for x64 (win and sysv, however, *only* w/ respect to types supported by dyncall) - python binding text cleanup and sync with current binding version - added suite_aggrs description and cleaned up other test suite descriptions a bit - update list of calling convention modes - cleanup and minor other fixes (e.g. changed \newpage in many places to \clearpage to avoid hitting float limit, crlf->cr, ...)