Improve PatternExtensions

[franzbecker]

Collect and implement ideas of more useful methods

Todo

• boolean matchesAll(CharSequence, Pattern...)
• Optional<String> substring(String, Pattern)

Maybe

• Look into Lambdas (either Xtend or Java8)
  • <T> T ifMatches(Pattern, Function<String, T>)
  • void ifMatches(Pattern, Procedure<String>)
  • Maybe pass in the matcher for the calculation of the lambdas?
• Utility methods for capturing groups