New functions

[KittyGiraudel]

• str-count-chars
• str-capitalize
• str-compare

[jamiebuilds]

Just some ideas stolen right from rails

• str-dasherize
• str-camelize
• str-humanize
• str-titleize

str-dasherize("a cool-string_name")
// => "a-cool-string-name"

str-camelize("a cool-string_name")
// => "ACoolStringName"

str-camelize("a cool-string_name", $lower: true)
// => "aCoolStringName"

str-humanize("a cool-string_name")
// => "A cool string name"

str-titleize("a cool-string_name")
// => "A Cool String Name"