Add unsigned int filter
Add bool filter
Add float filter
Add collection filter
Take advantage of the little optimization for is_bool checking
Merge pull request #8 from chadicus/master

Add url Filter
Merge pull request #7 from gaillard/master

Add unsigned int, bool, float, and collection filters
Rename Collections filter class to Arrays.
Merge pull request #9 from gaillard/master

Rename Collections filter class to Arrays.
Add filter aliases
Make Arrays notEmpty filter an "is" filter instead with min and max counts.
Merge pull request #11 from gaillard/namespace

Add filter aliases
Make list() work again with filterer by removing string indices to result. Also swap the error and unknowns index since our use case is best that way.
Merge pull request #12 from gaillard/master

Make list() work again with filterer by removing string indices to re…
Add ofStrings

Filter to ensure a given array contains only non-empty strings