Tidied profile results list code
`--long_cli_option` → `--long-cli-option` (underscores are annoying)
Merge pull request #72 from Zearin/feature/misc_cleaning

* Small code tweak
* Command-line options are now `--underscore_free`–er, I mean…`--underscore-free`! :tongue:
Move class-level attributes to top
Expanded docstring of `VowsResult`
Minor code clarity tweak
Minor code clarity tweaks (and comments)
Alphabetized standard lib imports

…and aligned imports for assertions package.
Minor code clarity tweaks
Don’t `pprint` results! :o
Minor refactoring of `VowsTestReporter`
Tidied up `VowsTestReporter` printing

This also required a few edits to the base class `VowsReporter`.

This, in turn, required a minor edit to a test (`tests/bugs/64_vows.py`).  (In the test, the lambdas arguments count must equal the corresponding methods in `VowsReporter`.)