Two Accessibility Changes

[danramteke]

1. The Pattern helper is useful, however, it's matcher method isn't public
2. When trying to reference types inside of the SwiftSoup module that have the same names as a type outside the module, the swift compiler emits an ambiguous reference error. For example Pattern has an ambiguous reference. And trying to say SwiftSoup.Pattern, the compiler says the SwiftSoup class doesn't have a member Pattern. Removing the class SwiftSoup helps the compiler know that SwiftSoup refers to the module and only the module, and not the class.