Handle inputs like ".5"
Casting value to a number

Was having problems when our server was returning strings for the value we were using in our ng-model.  'toFixed' is not a method on a String.  We could use Number(value) here but it is overkill as parseFloat seems to work fine.
Merge pull request #1 from RyanBertrand/patch-1

Casting value to a number
Bump version for parseFloat() fix
Fix #2: improve docs
1.0.0: Rewrite directive backed by full suite of unit tests
Allow entering the minus sign first
Add Travis CI badge
Fix typo
Closes #4: document command to install via bower
Handle case when ngModel is undefined
Bump version
Link to demo page