empty string is not a number
Merge pull request #144 from wpreul/master

Renaming _describe() to describe()
Merge pull request #139 from iamdoron/master

empty string is not a number
fix a typo in README.md
Merge pull request #145 from iamdoron/patch-1

fix a typo in README.md
Merge pull request #147 from wpreul/master

Adding positive/negative options for number
white spaces should not be validated as numbers
add tests to stress that a number with whitespaces is a number
Merge pull request #148 from iamdoron/master

white spaces should not be validated as a number
Adding length, min, and max to object