Add option to suppress printing the flaky report.

Passing --no-flaky-report on the command line will cause flaky to skip printing the report at the end of the test run.
Fix pep8/pylint errors with previous commit.
Bump version to 1.0.2
Fix extra blank line in docstring.
Merge pull request #18 from Jeff-Meadows/flaky_report

Add option to suppress printing the flaky report.