Facet Values Sort Order: Add 3rd choice: Numeric Sort

As a person, I need facet values to be in predictable, intuitive spots so that I can quickly and easily find the values that are appropriate to me.

Problem Statement: Today Solr has two default facet sort orders, neither of which provides predictable, intuitive facet value orders for people when the values start with numbers.

Goal: Address the problem where index sorts facet values how a computer would rather than how a human would. This is very problematic for E-commerce facets like 'size' and 'tire width'

Acceptance Criteria:
1. Sorts facet values numerically from lowest to highest
2. Works with both numeric and string fields (thus working on values that include letters... 25 mm, 30 waist, 32 Waist, 4 Petite)
3. If facet values don't start with a number, they are sorted alphabetically, after all values that do start with a number
4. If facet values are equal numerically, sort the numerically equal values alphabetically. Example: 10,10 Petite,10 Tall,12, Petite, 12 Tall
5. Integers and Floats are supported (even if string field)

Examples:
Women's Pants Sizes:
8
8 Tall
10
10 Petite
10 Tall
12
12 Tall
14 Petite
26 Waist
28 Waist
30 Waist
One Size

Bike Wheel Sizes:
20 Inches
24 Inches
26 Inches
27 Inches
27.5 Inches
27.5+ Inches
29 Inches
650c
700c