Customized default settings, added thousandsStay setting.

Set default prefix to "US$ " and default affixStay to "false".  Added thousandsStay setting with default value of "false".
Changed default settings for more general use.

Changed prefix, affixesStay, and thousandsStay default values from
personalized to more general purpose settings.
Refactored affix and thousands removal on blur
Fixed whitespace
Replace thousands on global regexp

Replaced ALL occurrences of the thousands symbol using a global regexp.
Whitespace formatting
Whitespace formatting
Update README.md
Merge pull request #1 from Nannoises/master

Merge thousandsStay setting pull requests