Refine/clarify existing specs of Or-to-Future conversions

  *  Factor out common vals
  *  Remove unnecessary "should"s from spec titles
Test conversions of Many(Bad...) to Future and Try
Refine/clarify existing specs of Either-to-Future conversions

  *  Factor out and rename common vals
  *  Remove unnecessary "should"s from spec titles
Refine/clarify existing specs of Try-to-Future conversions

  *  Factor out and rename common vals
  *  Remove unnecessary "should"s from spec titles
Refine/clarify existing specs of Future flatMap extensions

  *  Factor out and rename common vals
Refine/clarify existing conversion code

  *  Remove additional braces around match expressions
  *  Shorten some parameter names
  *  Organize imports
Merge pull request #1 from youdevise/marc-small-refinements

Mostly cosmetic changes, and a couple of new tests