Shorten/simplify doc TOC by removing redundant Roundup in titles. We already have a Roundup label at the top of the page. Remove the word Roundup from each item. Roundup Features -> Features etc. The titles for the pages keep the word Roundup since it will show up on the tab/browser window title etc.

try:
    # Python 3+
    from time import perf_counter
except (ImportError, AttributeError):
    # Python 2.5-2.7
    from time import clock as perf_counter   # noqa: F401