Semi-transparent colors should not return a name.
Update README.md

Removed " in typo
Merge branch 'patch-1' of https://github.com/robianmcd/TinyColor
accidentally pushed PR from Issue #25 without updating tests
add GitHub Flavored Markdown to README

* This makes the example code easier to read,
  especially when perusing the docs on github
Document utility functions.  Issue #31
MD formatting
prep for 0.9.17
Merge branch 'master' into gh-pages