Update index. Add "track your issues your way" tag line and... Add description of benefits to some of the noteworthy changes. Add GTD "thing management" from old email in the 1.6 time period. Reverse order of fast gratification so source directory is first then venv install. Match the first line that says you don't have to install.

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