Fix for toDashed(toCamel('str ABBR str'));

> $ morph.toDashed('My CSS and HTML parser');
> 'my-css-and-html-parser'

is correct.

> $ morph.toCamel('My CSS and HTML parser');
> 'myCSSAndHTMLParser'

is correct.

> $ morph.toDashed(morph.toCamel('My CSS and HTML parser'));
> 'my-cssand-htmlparser'

oops!
Fixed abbreviated conversions

- Fixed toSnake for abbreviations
- Fixed toSnakeCaps for abbreviations
- Fixed toHuman for abbreviations
- Fixed single letter word capitalizations for toHuman
- Fixed toTitle for abbreviations
- Added tests for all of the above
- NPM version bump